{"id":7313,"date":"2026-05-15T00:00:00","date_gmt":"2026-05-15T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/what-are-sfp-ports-on-a-switch\/"},"modified":"2026-06-22T03:22:23","modified_gmt":"2026-06-22T03:22:23","slug":"what-are-sfp-ports-on-a-switch","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-are-sfp-ports-on-a-switch","title":{"rendered":"C\u1ed5ng SFP tr\u00ean switch l\u00e0 g\u00ec? H\u01b0\u1edbng d\u1eabn d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"628\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c.jpg\" alt=\"What Are SFP Ports on a Switch?\" class=\"wp-image-7303\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/600df0d8b81d42d883ef3ab9cd6e180c-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">switches <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-network-switch\/\">routers<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-router-key-functions-types\/\">servers<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-servers-components-types-functions\/\">, and fiber optic links through interchangeable transceiver modules. Unlike standard RJ45 Ethernet ports, SFP ports can support both fiber optic and copper Ethernet connections depending on the installed module.<\/a>, Today, SFP ports are widely used in enterprise networks, data centers, surveillance systems,.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">fiber transceiver, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-an-isp-internet-service-provider\/\">However, many beginners are confused by common questions such as:<\/a> Are SFP ports fiber only? <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">Are all SFP ports 10Gb?<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Can you plug Ethernet into an SFP port?<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>What is the difference between SFP and SFP+?<\/p><\/li><li><p>Do all<\/p><\/li><li><p>B\u1ea1n c\u00f3 th\u1ec3 c\u1eafm c\u00e1p Ethernet v\u00e0o c\u1ed5ng SFP kh\u00f4ng?<\/p><\/li><li><p>SFP technology<\/p><\/li><li><p>combines multiple concepts, including Ethernet standards, fiber optics, copper cabling, and modular transceivers. In real-world deployments, compatibility between switches, transceiver modules, cable types, and network speeds is one of the most important factors affecting network stability. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">C\u00e1c m\u00f4-\u0111un SFP<\/a> What an SFP port is and how it works<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y r\u1ea5t ph\u1ed5 bi\u1ebfn v\u00ec <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-technology-explained-types-compatibility-and-fixes\/\">How to choose compatible SFP modules<\/a> Common SFP compatibility mistakes to avoid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u01b0\u1edbng d\u1eabn d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u n\u00e0y, b\u1ea1n s\u1ebd h\u1ecdc \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng SFP l\u00e0 g\u00ec v\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3<\/p><\/li><li><p>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u1ed5ng SFP, SFP+ v\u00e0 RJ45<\/p><\/li><li><p>C\u1ed5ng SFP c\u00f3 h\u1ed7 tr\u1ee3 c\u00e1p quang, Ethernet hay c\u1ea3 hai hay kh\u00f4ng<\/p><\/li><li><p>C\u00e1ch ch\u1ecdn c\u00e1c m\u00f4-\u0111un SFP t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch SFP c\u1ea7n tr\u00e1nh<\/p><\/li><li><p>Khi n\u00e0o c\u1ed5ng SFP t\u1ed1t h\u01a1n c\u00e1c c\u1ed5ng Ethernet truy\u1ec1n th\u1ed1ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 b\u1ea1n \u0111ang n\u00e2ng c\u1ea5p m\u1ea1ng doanh nghi\u1ec7p, x\u00e2y d\u1ef1ng ph\u00f2ng lab t\u1ea1i nh\u00e0, k\u1ebft n\u1ed1i internet c\u00e1p quang hay l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p uplink cho switch, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ed5ng SFP s\u1ebd gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng c\u00e1c m\u1ea1ng nhanh h\u01a1n, linh ho\u1ea1t h\u01a1n v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng h\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 C\u1ed5ng SFP l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t c\u1ed5ng SFP (c\u1ed5ng nh\u1ecf d\u1ea1ng c\u1eafm r\u1eddi \u2013 Small Form-factor Pluggable port) l\u00e0 m\u1ed9t giao di\u1ec7n m\u1ea1ng m\u00f4-\u0111un \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y tr\u00ean c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng kh\u00e1c. Thay v\u00ec s\u1eed d\u1ee5ng lo\u1ea1i \u0111\u1ea7u n\u1ed1i c\u1ed1 \u0111\u1ecbnh, c\u1ed5ng SFP ch\u1ea5p nh\u1eadn c\u00e1c m\u00f4-\u0111un thu ph\u00e1t c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau, h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i Ethernet quang s\u1ee3i ho\u1eb7c \u0111\u1ed3ng. Thi\u1ebft k\u1ebf m\u00f4-\u0111un n\u00e0y cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng thay \u0111\u1ed5i kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn, lo\u1ea1i c\u00e1p v\u00e0 t\u1ed1c \u0111\u1ed9 m\u1ea1ng m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf to\u00e0n b\u1ed9 b\u1ed9 chuy\u1ec3n m\u1ea1ch.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a.jpg\" alt=\"What Is an SFP Port?\" class=\"wp-image-7304\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c2e55ae034b40f9a082ea585f53022a-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed5ng SFP th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft quang l\u00ean gi\u1eefa c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>K\u1ebft n\u1ed1i m\u1ea1ng kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>K\u1ebft n\u1ed1i m\u00e1y ch\u1ee7 t\u1ed1c \u0111\u1ed9 cao<\/p><\/li><li><p>Li\u00ean k\u1ebft t\u1eadp h\u1ee3p trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/li><li><p>Unlike standard RJ45 Ethernet ports, an SFP port itself does not determine the cable type or transmission medium. The installed SFP transceiver module determines whether the connection uses:<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Multimode fiber <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">Single-mode fiber<\/a> Copper Ethernet (RJ45)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Direct Attach Copper (DAC)<\/p><\/li><li><p>What Does SFP Stand For?<\/p><\/li><li><p>SFP stands for:<\/p><\/li><li><p>Small Form-factor Pluggable<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/direct-attach-cables-dac-in-networking\/\">SFF-8472<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Because SFP modules are hot-swappable, administrators can replace or upgrade transceivers without shutting down the entire network device.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Common Types of SFP Connections<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">SFP Connection Type <strong>Typical Medium<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1000BASE-SX<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Short-range switch uplinks<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-8472-standard-explained-ddm-for-optical-transceivers\/\">Long-distance fiber links<\/a><\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/multi-source-agreements-optical-transceivers\/\">Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n<\/a> (MSA)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45 Copper SFP <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/are-sfp-modules-hot-swappable-safe-sfp-hot-swap-guide\/\">Cat5e\/Cat6 Ethernet<\/a>, Copper Ethernet networking.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >DAC Cable<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 231px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"231\"><p>Twinax copper<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Data center rack connections<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"231\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">C\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c xem x\u00e9t n\u1ebfu s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Direct Attach Copper (DAC)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Modern switches include SFP ports because network environments often require different transmission media and distances.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"231\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">1000BASE-LX<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>RJ45 Ethernet works well for short office connections<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"231\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476812.htm\">Fiber optic links are better for long-distance or EMI-sensitive environments<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet Cat5e\/Cat6<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng Ethernet \u0111\u1ed3ng<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"231\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26454-dac-aoc-aec-cables.htm\">C\u00e1p DAC<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng \u0111\u00f4i tr\u1ee5c (Twinax)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i gi\u00e1 \u0111\u1ee1 trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao c\u00e1c switch m\u1ea1ng s\u1eed d\u1ee5ng c\u1ed5ng SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch hi\u1ec7n \u0111\u1ea1i bao g\u1ed3m c\u1ed5ng SFP v\u00ec m\u00f4i tr\u01b0\u1eddng m\u1ea1ng th\u01b0\u1eddng y\u00eau c\u1ea7u c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn v\u00e0 kho\u1ea3ng c\u00e1ch kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ethernet RJ45 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t cho c\u00e1c k\u1ebft n\u1ed1i v\u0103n ph\u00f2ng ng\u1eafn<\/p><\/li><li><p>Li\u00ean k\u1ebft quang s\u1ee3i ph\u00f9 h\u1ee3p h\u01a1n cho m\u00f4i tr\u01b0\u1eddng kho\u1ea3ng c\u00e1ch xa ho\u1eb7c nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/p><\/li><li><p>DAC c\u00e1p gi\u1ea3m chi ph\u00ed v\u00e0 ti\u00eau th\u1ee5 \u0111i\u1ec7n trong c\u00e1c rack m\u00e1y ch\u1ee7<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Thay v\u00ec s\u1ea3n xu\u1ea5t c\u00e1c m\u00f4 h\u00ecnh giao di\u1ec7n chuy\u1ec3n m\u1ea1ch ri\u00eang bi\u1ec7t cho t\u1eebng lo\u1ea1i k\u1ebft n\u1ed1i, c\u00e1c nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng c\u1ed5ng SFP modul \u0111\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng tri\u1ec3n khai linh ho\u1ea1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u1ea1ng m\u1ea1ng v\u00e0 m\u1ea1ng c\u00f4ng nghi\u1ec7p, c\u1ed5ng SFP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng<\/p><\/li><li><p>Aggregation m\u1ea1ng\u9aa8\u5e72\u5149\u7ea4<\/p><\/li><li><p>K\u1ebft n\u1ed1i m\u00e1y ch\u1ee7<\/p><\/li><li><p>M\u1ea1ng tr\u01b0\u1eddng h\u1ecdc<\/p><\/li><li><p>M\u1ea1ng gi\u00e1m s\u00e1t<\/p><\/li><li><p>H\u1ec7 th\u1ed1ng Ethernet c\u00f4ng nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u1ed5ng SFP so v\u1edbi c\u1ed5ng Ethernet c\u1ed1 \u0111\u1ecbnh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng nh\u1ea7m l\u1eabn l\u1edbn nh\u1ea5t c\u1ee7a ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u l\u00e0 gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng c\u1ed5ng SFP l\u00e0 \u201cc\u00e1c c\u1ed5ng quang \u0111\u1eb7c bi\u1ec7t\u201d t\u00e1ch bi\u1ec7t kh\u1ecfi Ethernet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c t\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ethernet l\u00e0 m\u1ed9t protocol m\u1ea1ng<\/p><\/li><li><p>SFP l\u00e0 m\u1ed9t c\u1ed5ng v\u1eadt l\u00fd modul<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t c\u1ed5ng SFP c\u00f3 th\u1ec3 v\u1eabn truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u Ethernet khi s\u1eed d\u1ee5ng quang h\u1ecdc nh\u01b0 ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n t\u1ea3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y quan tr\u1ecdng v\u00ec nhi\u1ec1u ng\u01b0\u1eddi sai l\u1ea7m khi gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Quang s\u1ee3i \u2260 Ethernet<\/p><\/li><li><p>SFP \u2260 Ethernet<\/p><\/li><li><p>SFP t\u1ef1 \u0111\u1ed9ng c\u00f3 ngh\u0129a l\u00e0 10Gb<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c t\u1ebf, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a k\u1ebft n\u1ed1i ph\u1ee5 thu\u1ed9c v\u00e0o ph\u1ea7n m\u1ec1m m\u1ea1ng, thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch v\u00e0 module chuy\u1ec3n m\u1ea1ch \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 C\u1ea3m \u01a1n c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ed5ng SFP tr\u00ean thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t c\u1ed5ng SFP tr\u00ean thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t modul chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 th\u00e1o r\u1eddi <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488468.htm\">\u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u m\u1ea1ng th\u00e0nh t\u00edn hi\u1ec7u quang ho\u1eb7c t\u00edn hi\u1ec7u \u0111i\u1ec7n. Thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch cung c\u1ea5p giao di\u1ec7n v\u00e0 logic chuy\u1ec3n m\u1ea1ch, trong khi modul chuy\u1ec3n m\u1ea1ch SFP c\u00e0i \u0111\u1eb7t x\u00e1c \u0111\u1ecbnh lo\u1ea1i k\u1ebft n\u1ed1i, t\u1ed1c \u0111\u1ed9, ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n. Thi\u1ebft k\u1ebf modul n\u00e0y cho ph\u00e9p m\u1ed9t c\u1ed5ng tr\u00ean thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i quang, c\u00e1p Ethernet ho\u1eb7c c\u00e1p tr\u1ef1c ti\u1ebfp kh\u00f4ng thay \u0111\u1ed5i thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch.<\/a> C\u1ea3m \u01a1n c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ed5ng SFP tr\u00ean thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2.jpg\" alt=\"How Does an SFP Port Work on a Switch?\" class=\"wp-image-7305\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/77cfe6fd1e864cd091ecc0686e0067e2-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ed9t c\u1ed5ng SFP kh\u00f4ng tr\u1ef1c ti\u1ebfp truy\u1ec1n d\u1eef li\u1ec7u m\u00e0 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t khe c\u1eafm ti\u00eau chu\u1ea9n ch\u1ea5p nh\u1eadn m\u1ed9t modul chuy\u1ec3n m\u1ea1ch SFP t\u01b0\u01a1ng th\u00edch.<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh truy\u1ec1n th\u00f4ng th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng nh\u01b0 sau:.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ASIC c\u1ee7a thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch t\u1ea1o ra t\u00edn hi\u1ec7u d\u1eef li\u1ec7u Ethernet<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>C\u1ed5ng SFP truy\u1ec1n t\u00edn hi\u1ec7u \u0111i\u1ec7n \u0111\u1ebfn modul chuy\u1ec3n m\u1ea1ch \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t<\/p><\/li><li><p>Modul chuy\u1ec3n m\u1ea1ch chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u th\u00e0nh:<\/p><\/li><li><p>T\u00edn hi\u1ec7u quang cho quang fiber<\/p><ul><li><p>T\u00edn hi\u1ec7u quang cho c\u00e1p quang s\u1ee3i<\/p><\/li><li><p>T\u00edn hi\u1ec7u \u0111i\u1ec7n cho Ethernet \u0111\u1ed3ng<\/p><\/li><\/ul><\/li><li><p>T\u00edn hi\u1ec7u truy\u1ec1n qua c\u00e1p \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i<\/p><\/li><li><p>Thi\u1ebft b\u1ecb nh\u1eadn chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u tr\u1edf l\u1ea1i th\u00e0nh d\u1eef li\u1ec7u Ethernet<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn tr\u00fac n\u00e0y t\u00e1ch bi\u1ec7t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u1ea7n c\u1ee9ng chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>Ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn<\/p><\/li><li><p>Lo\u1ea1i \u0111\u1ea7u n\u1ed1i v\u1eadt l\u00fd<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00f9ng m\u1ed9t b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh b\u00ean trong m\u1ed9t k\u1ebft n\u1ed1i SFP<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 310px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p>B\u1ed9 ph\u1eadn<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p>B\u1ed9 chuy\u1ec3n m\u1ea1ch <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-application-specific-integrated-circuit-asic\/\">ASIC<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u1eed l\u00fd c\u00e1c g\u00f3i tin Ethernet<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p>C\u1ed5ng SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cung c\u1ea5p giao di\u1ec7n \u0111i\u1ec7n m\u00f4-\u0111un<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">B\u1ed9 thu ph\u00e1t SFP<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Chuy\u1ec3n \u0111\u1ed5i gi\u1eefa t\u00edn hi\u1ec7u \u0111i\u1ec7n v\u00e0 quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p>C\u00e1p quang ho\u1eb7c \u0111\u1ed3ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n t\u1ea3i t\u00edn hi\u1ec7u v\u1eadt l\u00fd<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"310\"><p>Thi\u1ebft b\u1ecb \u1edf xa<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Nh\u1eadn v\u00e0 gi\u1ea3i m\u00e3 t\u00edn hi\u1ec7u truy\u1ec1n \u0111i<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea5u tr\u00fac m\u00f4-\u0111un n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng l\u1ee3i th\u1ebf l\u1edbn nh\u1ea5t c\u1ee7a m\u1ea1ng SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t c\u1ed5ng SFP b\u1ea3n th\u00e2n n\u00f3 kh\u00f4ng truy\u1ec1n tr\u1ef1c ti\u1ebfp t\u00edn hi\u1ec7u quang. Thay v\u00e0o \u0111\u00f3, m\u00f4-\u0111un thu ph\u00e1t \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o s\u1ebd th\u1ef1c hi\u1ec7n chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u gi\u1eefa b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 c\u00e1p \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng nh\u01b0 sau:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>ASIC c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch t\u1ea1o ra d\u1eef li\u1ec7u Ethernet<\/p><\/li><li><p>C\u1ed5ng SFP truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u1ebfn m\u00f4-\u0111un thu ph\u00e1t<\/p><\/li><li><p>T\u00edn hi\u1ec7u quang cho quang fiber<\/p><ul><li><p>T\u00edn hi\u1ec7u quang cho c\u00e1p quang s\u1ee3i<\/p><\/li><li><p>T\u00edn hi\u1ec7u \u0111i\u1ec7n cho Ethernet \u0111\u1ed3ng<\/p><\/li><\/ul><\/li><li><p>T\u00edn hi\u1ec7u truy\u1ec1n qua c\u00e1p \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i<\/p><\/li><li><p>Thi\u1ebft b\u1ecb nh\u1eadn chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u tr\u1edf l\u1ea1i th\u00e0nh d\u1eef li\u1ec7u Ethernet<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn tr\u00fac m\u00f4-\u0111un n\u00e0y cho ph\u00e9p k\u1ef9 s\u01b0 m\u1ea1ng thay \u0111\u1ed5i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c lo\u1ea1i c\u00e1p<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn<\/p><\/li><li><p>T\u1ed1c \u0111\u1ed9 m\u1ea1ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9 b\u1eb1ng c\u00e1ch thay th\u1ebf m\u00f4-\u0111un SFP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c m\u00f4-\u0111un SFP s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP s\u1ee3i quang chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u Ethernet th\u00e0nh c\u00e1c xung \u00e1nh s\u00e1ng \u0111\u1ec3 truy\u1ec1n qua c\u00e1p quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c m\u00f4-\u0111un s\u1ee3i quang s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea7u n\u1ed1i quang LC<\/p><\/li><li><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/li><li><p>S\u1ee3i quang \u0111a mode (MMF)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c chu\u1ea9n s\u1ee3i quang ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c xem x\u00e9t n\u1ebfu s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Direct Attach Copper (DAC)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 550 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>1000BASE-LX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 10 km<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476865.htm\">1000BASE-ZX<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>L\u00ean \u0111\u1ebfn 80 km<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP s\u1ee3i quang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft l\u00ean (uplink) c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>Li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng trong khu\u00f4n vi\u00ean<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP)<\/p><\/li><li><p>M\u1ea1ng kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec s\u1ee3i quang ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), n\u00ean n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p v\u00e0 doanh nghi\u1ec7p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c m\u00f4-\u0111un SFP RJ45<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476800.htm\">C\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng<\/a> Cho ph\u00e9p c\u00e1p Ethernet ti\u00eau chu\u1ea9n k\u1ebft n\u1ed1i th\u00f4ng qua khe c\u1eafm SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thay v\u00ec s\u1eed d\u1ee5ng truy\u1ec1n d\u1eabn quang, c\u00e1c m\u00f4-\u0111un n\u00e0y chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u t\u1eeb b\u1ed9 chuy\u1ec3n m\u1ea1ch th\u00e0nh t\u00edn hi\u1ec7u Ethernet tr\u00ean c\u00e1p \u0111\u1ed3ng t\u01b0\u01a1ng th\u00edch v\u1edbi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p Cat5e<\/p><\/li><li><p>C\u00e1p Cat6<\/p><\/li><li><p>C\u00e1p Cat6a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476771.htm\">C\u00e1c m\u00f4-\u0111un SFP RJ45<\/a> H\u1eefu \u00edch khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ec7 th\u1ed1ng c\u00e1p \u0111\u1ed3ng hi\u1ec7n h\u1eefu \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>Vi\u1ec7c tri\u1ec3n khai c\u00e1p quang l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft<\/p><\/li><li><p>C\u00e1c k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn l\u00e0 \u0111\u1ee7<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n<\/p><\/li><li><p>Sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch ng\u1eafn h\u01a1n \u1edf t\u1ed1c \u0111\u1ed9 cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482686.htm\">10GBASE-T<\/a> C\u00e1c m\u00f4-\u0111un SFP+ RJ45 th\u01b0\u1eddng n\u00f3ng h\u01a1n c\u00e1c m\u00f4-\u0111un SFP+ quang trong c\u00e1c tri\u1ec3n khai b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1eadt \u0111\u1ed9 cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 C\u1ed5ng SFP ch\u1ec9 d\u00f9ng cho c\u00e1p quang hay kh\u00f4ng?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. M\u1ed9t c\u1ed5ng SFP kh\u00f4ng gi\u1edbi h\u1ea1n ch\u1ec9 cho m\u1ea1ng quang h\u1ecdc. C\u1ed5ng SFP c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 c\u1ea3 k\u1ebft n\u1ed1i m\u1ea1ng quang h\u1ecdc v\u00e0 \u0111\u1ed3ng t\u00f9y thu\u1ed9c v\u00e0o m\u00f4-\u0111un thu ph\u00e1t \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482145.htm\">c\u00e1c module SFP quang<\/a> s\u1eed d\u1ee5ng c\u00e1p quang cho truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch xa, trong khi c\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng RJ45 cho ph\u00e9p c\u00e1p Ethernet ti\u00eau chu\u1ea9n k\u1ebft n\u1ed1i th\u00f4ng qua c\u00f9ng m\u1ed9t khe c\u1eafm SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh linh ho\u1ea1t n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng l\u00fd do khi\u1ebfn c\u1ed5ng SFP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb.jpg\" alt=\"Is an SFP Port Fiber Only?\" class=\"wp-image-7306\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287e13b09df2455190984df3e33880cb-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00f4-\u0111un SFP quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP quang chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u Ethernet th\u00e0nh \u00e1nh s\u00e1ng quang \u0111\u1ec3 truy\u1ec1n qua c\u00e1p quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft l\u00ean (uplink) c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>M\u1ea1ng kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>K\u1ebft n\u1ed1i x\u01b0\u01a1ng s\u1ed1ng khu\u00f4n vi\u00ean<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft c\u00e1c m\u00f4-\u0111un SFP quang s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-duplex-lc-connector-explained\/\">\u0110\u1ea7u n\u1ed1i quang LC<\/a><\/p><\/li><li><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/li><li><p>S\u1ee3i quang \u0111a mode (MMF)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c xem x\u00e9t n\u1ebfu s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Direct Attach Copper (DAC)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 550 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>1000BASE-LX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 10 km<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft n\u1ed1i quang \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng v\u00ec ch\u00fang cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn d\u00e0i h\u01a1n<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) t\u1ed1t h\u01a1n<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng b\u0103ng th\u00f4ng cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00f4-\u0111un SFP \u0111\u1ed3ng RJ45<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng RJ45 cho ph\u00e9p c\u00e1p Ethernet ti\u00eau chu\u1ea9n ho\u1ea1t \u0111\u1ed9ng qua c\u1ed5ng SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y h\u1ed7 tr\u1ee3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p Ethernet Cat5e<\/p><\/li><li><p>C\u00e1p Cat6<\/p><\/li><li><p>C\u00e1p Cat6a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ec7 th\u1ed1ng c\u00e1p Ethernet hi\u1ec7n c\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>Vi\u1ec7c tri\u1ec3n khai c\u00e1p quang l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft<\/p><\/li><li><p>C\u00e1c k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn l\u00e0 \u0111\u1ee7<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c m\u00f4-\u0111un SFP \u0111\u1ed3ng RJ45 th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n<\/p><\/li><li><p>Sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a ng\u1eafn h\u01a1n so v\u1edbi c\u00e1p quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, c\u00e1c li\u00ean k\u1ebft Ethernet \u0111\u1ed3ng ti\u00eau chu\u1ea9n th\u01b0\u1eddng b\u1ecb gi\u1edbi h\u1ea1n \u1edf m\u1ee9c 100 m\u00e9t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >So s\u00e1nh gi\u1eefa quang v\u00e0 \u0111\u1ed3ng<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u1ed1i \u0111a<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>SFP \u0111\u1ed3ng RJ45<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p Ethernet<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>LC<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>RJ45<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f3 th\u1ec3 l\u00ean t\u1edbi h\u00e0ng kil\u00f4m\u00e9t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u01b0\u1eddng l\u00e0 100 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Xu\u1ea5t s\u1eafc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau Th\u1ee5 N\u0103ng L\u01b0\u1ee3ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Lower<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao h\u01a1n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft l\u00ean (uplink) v\u00e0 li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng v\u0103n ph\u00f2ng v\u00e0 m\u1ea1ng t\u1ea7m ng\u1eafn<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng doanh nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u1ea3 hai lo\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng RJ45 cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i<\/p><\/li><li><p>C\u1ed5ng SFP quang cho k\u1ebft n\u1ed1i l\u00ean (uplink) v\u00e0 k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn lai n\u00e0y cung c\u1ea5p c\u1ea3 t\u00ednh linh ho\u1ea1t l\u1eabn kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 T\u1ea5t c\u1ea3 c\u00e1c c\u1ed5ng SFP \u0111\u1ec1u c\u00f3 t\u1ed1c \u0111\u1ed9 10 Gb hay kh\u00f4ng?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c c\u1ed5ng SFP \u0111\u1ec1u h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 10 Gb. C\u00e1c c\u1ed5ng SFP ti\u00eau chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho Ethernet 1 Gb, trong khi c\u00e1c c\u1ed5ng SFP+ h\u1ed7 tr\u1ee3 Ethernet 10 Gb. C\u00e1c phi\u00ean b\u1ea3n t\u1ed1c \u0111\u1ed9 cao h\u01a1n nh\u01b0 SFP28 h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i 25 Gb. M\u1eb7c d\u00f9 c\u00e1c c\u1ed5ng n\u00e0y c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng nhau v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, t\u1ed1c \u0111\u1ed9 h\u1ed7 tr\u1ee3 c\u1ee7a ch\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o ph\u1ea7n c\u1ee9ng switch, lo\u1ea1i b\u1ed9 thu ph\u00e1t (transceiver) v\u00e0 ti\u00eau chu\u1ea9n m\u1ea1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5.jpg\" alt=\"Are All SFP Ports 10Gb?\" class=\"wp-image-7307\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/287efddb4c6343a784eb7231890947d5-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u l\u00e0 gi\u1ea3 \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>SFP = 10 Gb<\/p><\/li><li><p>T\u1ea5t c\u1ea3 c\u00e1c module SFP \u0111\u1ec1u thay th\u1ebf \u0111\u01b0\u1ee3c cho nhau<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean th\u1ef1c t\u1ebf, SFP v\u00e0 SFP+ l\u00e0 hai ti\u00eau chu\u1ea9n kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c ti\u00eau chu\u1ea9n t\u1ed1c \u0111\u1ed9 SFP ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 209px;\"\/><col style=\"width: 240px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"209\"><p>Lo\u1ea1i c\u1ed5ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\" colwidth=\"240\"><p>T\u1ed1c \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"209\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"240\"><p>1Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1000BASE-X<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"209\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">SFP+<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"240\"><p>10 Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10GBASE-X<br><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"209\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26225-25g-sfp28.htm\">SFP28<\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"240\"><p>25 Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet 25 Gb<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"209\"><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\">QSFP28<br><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\" colwidth=\"240\"><p>100 Gbps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ethernet 100 Gb<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 c\u00e1c giao di\u1ec7n n\u00e0y c\u00f3 th\u1ec3 tr\u00f4ng t\u01b0\u01a1ng t\u1ef1 nhau, ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c t\u1ed1c \u0111\u1ed9 t\u00edn hi\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng ph\u1ea7n c\u1ee9ng kh\u00e1c nhau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u1ed5ng SFP v\u00e0 c\u1ed5ng SFP+ l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed5ng SFP v\u00e0 c\u1ed5ng SFP+ v\u1ec1 m\u1eb7t v\u1eadt l\u00fd t\u01b0\u01a1ng t\u1ef1 nhau nh\u01b0ng kh\u00e1c nhau v\u1ec1 m\u1eb7t \u0111i\u1ec7n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng SFP ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ea1ng 1 Gb<\/p><\/li><li><p>C\u1ed5ng SFP+ \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho Ethernet 10 Gb<\/p><\/li><li><p>Ph\u1ea7n c\u1ee9ng SFP+ h\u1ed7 tr\u1ee3 hi\u1ec7u su\u1ea5t t\u00edn hi\u1ec7u cao h\u01a1n nhi\u1ec1u<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong nhi\u1ec1u switch doanh nghi\u1ec7p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c module SFP ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ed5ng SFP+ \u1edf t\u1ed1c \u0111\u1ed9 1 Gb<\/p><\/li><li><p>C\u00e1c module SFP+ th\u01b0\u1eddng kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ed5ng SFP ch\u1ec9 h\u1ed7 tr\u1ee3 1 Gb<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh t\u01b0\u01a1ng th\u00edch ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ed7 tr\u1ee3 c\u1ee7a ASIC tr\u00ean switch<\/p><\/li><li><p>Gi\u1edbi h\u1ea1n ph\u1ea7n m\u1ec1m\u56fa\u4ef6 (firmware)<\/p><\/li><li><p>Quy t\u1eafc t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1ch ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 c\u1ed5ng SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi mua module SFP, lu\u00f4n x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i c\u1ed5ng switch<\/p><\/li><li><p>C\u00e1c ti\u00eau chu\u1ea9n Ethernet \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Danh s\u00e1ch t\u01b0\u01a1ng th\u00edch module<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 ph\u1ea7n m\u1ec1m\u56fa\u4ef6 (firmware)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ngu\u1ed3n th\u00f4ng tin \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt (datasheet) c\u1ee7a switch<\/p><\/li><li><p>Ma tr\u1eadn t\u01b0\u01a1ng th\u00edch c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\">Ti\u00eau chu\u1ea9n IEEE<\/a> t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c module kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ef1 c\u1ed1 li\u00ean k\u1ebft (link failures)<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9<\/p><\/li><li><p>K\u1ebft n\u1ed1i kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li><li><p>V\u1ea5n \u0111\u1ec1 qu\u00e1 nhi\u1ec7t ho\u1eb7c ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t qu\u00e1 m\u1ee9c<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ed d\u1ee5 tri\u1ec3n khai th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t t\u00ecnh hu\u1ed1ng n\u00e2ng c\u1ea5p ph\u1ed5 bi\u1ebfn l\u00e0 chuy\u1ec3n t\u1eeb m\u1ea1ng 1 Gb sang m\u1ea1ng 10 Gb trong ph\u00f2ng m\u00e1y ch\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thay v\u00ec thay th\u1ebf to\u00e0n b\u1ed9 switch ngay l\u1eadp t\u1ee9c, c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p quang SFP hi\u1ec7n c\u00f3<\/p><\/li><li><p>N\u00e2ng c\u1ea5p l\u00ean switch v\u00e0 module SFP+<\/p><\/li><li><p>T\u00e1i s\u1eed d\u1ee5ng c\u00e1p quang LC t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Con \u0111\u01b0\u1eddng n\u00e2ng c\u1ea5p theo m\u00f4-\u0111un n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng l\u00fd do khi\u1ebfn c\u00f4ng ngh\u1ec7 SFP v\u1eabn ph\u1ed5 bi\u1ebfn trong c\u00e1c m\u1ea1ng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 B\u1ea1n c\u00f3 th\u1ec3 c\u1eafm thi\u1ebft b\u1ecb n\u00e0o v\u00e0o c\u1ed5ng SFP?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n kh\u00f4ng th\u1ec3 c\u1eafm c\u00e1p tr\u1ef1c ti\u1ebfp v\u00e0o h\u1ea7u h\u1ebft c\u00e1c c\u1ed5ng SFP. M\u1ed9t c\u1ed5ng SFP y\u00eau c\u1ea7u m\u1ed9t m\u00f4-\u0111un b\u1ed9 thu ph\u00e1t t\u01b0\u01a1ng th\u00edch ho\u1eb7c c\u00e1p DAC tr\u01b0\u1edbc ti\u00ean. Sau khi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, m\u00f4-\u0111un SFP x\u00e1c \u0111\u1ecbnh lo\u1ea1i k\u1ebft n\u1ed1i m\u00e0 c\u1ed5ng h\u1ed7 tr\u1ee3, bao g\u1ed3m c\u00e1p quang, c\u00e1p Ethernet RJ45 ho\u1eb7c k\u1ebft n\u1ed1i \u0111\u1ed3ng tr\u1ee5c tr\u1ef1c ti\u1ebfp (DAC). Thi\u1ebft k\u1ebf m\u00f4-\u0111un n\u00e0y cho ph\u00e9p m\u1ed9t c\u1ed5ng SFP h\u1ed7 tr\u1ee3 nhi\u1ec1u ph\u01b0\u01a1ng ti\u1ec7n m\u1ea1ng v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n t\u1ea3i kh\u00e1c nhau.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61.jpg\" alt=\"What Can You Plug Into an SFP Port?\" class=\"wp-image-7308\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/7f3477e259a64cf48643e8f284732d61-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i qua c\u1ed5ng SFP bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Switch m\u1ea1ng<\/p><\/li><li><p>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li><li><p>M\u00e1y ch\u1ee7<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/media-converters-what-they-are-and-how-media-converters-work\/\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i ph\u01b0\u01a1ng ti\u1ec7n quang (fiber media converters)<\/a><\/p><\/li><li><p>H\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 thu ph\u00e1t quang (Fiber Optic Transceivers)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP quang l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong switch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y h\u1ed7 tr\u1ee3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang \u0111a mode (MMF)<\/p><\/li><li><p>S\u1ee3i quang \u0111\u01a1n mode (SMF)<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i quang LC<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed9 thu ph\u00e1t quang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft l\u00ean (uplink) c\u1ee7a b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li><li><p>K\u1ebft n\u1ed1i x\u01b0\u01a1ng s\u1ed1ng (backbone) trong trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/li><li><p>M\u1ea1ng kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ti\u00eau chu\u1ea9n c\u00e1p quang \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 226px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"226\"><p>Lo\u1ea1i m\u00f4-\u0111un<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Lo\u1ea1i s\u1ee3i<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"226\"><p>C\u00e1c h\u1ea1n ch\u1ebf m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c xem x\u00e9t n\u1ebfu s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb quang h\u1ecdc c\u1ee7a b\u00ean th\u1ee9 ba<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Direct Attach Copper (DAC)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 550 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"226\"><p>1000BASE-LX<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>What Does SFP Stand For?<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ebfn 10 km<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Module SFP \u0111\u1ed3ng tr\u1ee5c RJ45<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">RJ45 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/482735.htm\">SFP \u0111\u1ed3ng<\/a> C\u00e1c module n\u00e0y cho ph\u00e9p s\u1eed d\u1ee5ng c\u00e1p Ethernet ti\u00eau chu\u1ea9n k\u1ebft n\u1ed1i qua khe c\u1eafm SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y h\u1ed7 tr\u1ee3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p Cat5e<\/p><\/li><li><p>C\u00e1p Cat6<\/p><\/li><li><p>C\u00e1p Ethernet Cat6a<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP RJ45 r\u1ea5t h\u1eefu \u00edch khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ec7 th\u1ed1ng c\u00e1p \u0111\u1ed3ng hi\u1ec7n h\u1eefu \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>C\u00e1c k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn l\u00e0 \u0111\u1ee7<\/p><\/li><li><p>Vi\u1ec7c tri\u1ec3n khai c\u00e1p quang l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c module SFP \u0111\u1ed3ng tr\u1ee5c th\u01b0\u1eddng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ti\u00eau th\u1ee5 nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n<\/p><\/li><li><p>Sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch ng\u1eafn h\u01a1n so v\u1edbi c\u00e1p quang<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1p DAC v\u00e0 AOC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 c\u1ed5ng SFP h\u1ed7 tr\u1ee3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1p DAC (Direct Attach Copper)<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/aoc-explained-active-optical-cable-benefits-uses-advancements-guide\/\">AOC<\/a> (C\u00e1p quang ch\u1ee7 \u0111\u1ed9ng)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e1p DAC th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i ng\u1eafn trong t\u1ee7 rack m\u00e1y ch\u1ee7<\/p><\/li><li><p>Chuy\u1ec3n m\u1ea1ch top-of-rack trong trung t\u00e2m d\u1eef li\u1ec7u<\/p><\/li><li><p>M\u1ea1ng \u0111\u1ed9 tr\u1ec5 th\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e1p AOC s\u1eed d\u1ee5ng b\u1ed9 thu ph\u00e1t quang t\u00edch h\u1ee3p v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao \u1edf kho\u1ea3ng c\u00e1ch xa h\u01a1n<\/p><\/li><li><p>Qu\u1ea3n l\u00fd c\u00e1p \u0111\u01a1n gi\u1ea3n h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ee7a ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 c\u1ed1 g\u1eafng c\u1eafm tr\u1ef1c ti\u1ebfp c\u00e1p Ethernet th\u00f4ng th\u01b0\u1eddng v\u00e0o m\u1ed9t c\u1ed5ng SFP tr\u1ed1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ea3n th\u00e2n khe c\u1eafm SFP kh\u00f4ng ch\u1ea5p nh\u1eadn c\u00e1p RJ45<\/p><\/li><li><p>M\u1ed9t b\u1ed9 thu ph\u00e1t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/472675.htm\">SFP RJ45 t\u01b0\u01a1ng th\u00edch<\/a> ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u01b0\u1edbc ti\u00ean<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u01b0\u01a1ng t\u1ef1, c\u00e1p quang \u0111\u00f2i h\u1ecfi c\u00e1c module <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477686.htm\">SFP quang t\u01b0\u01a1ng th\u00edch<\/a> \u1edf c\u1ea3 hai \u0111\u1ea7u k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >L\u1ef1a ch\u1ecdn k\u1ebft n\u1ed1i SFP ph\u00f9 h\u1ee3p<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng \u00e1n t\u1ed1i \u01b0u ph\u1ee5 thu\u1ed9c v\u00e0o m\u00f4i tr\u01b0\u1eddng m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 318px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"318\"><p>T\u00ecnh hu\u1ed1ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"318\"><p>Uplink kho\u1ea3ng c\u00e1ch xa<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Module SFP quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"318\"><p>Ethernet v\u0103n ph\u00f2ng hi\u1ec7n h\u1eefu<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>SFP \u0111\u1ed3ng RJ45<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"318\"><p>K\u1ebft n\u1ed1i ng\u1eafn trong t\u1ee7 rack<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p DAC<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"318\"><p>Li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00e1p AOC<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ch\u1ecdn \u0111\u00fang module SFP gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch<\/p><\/li><li><p>S\u1ef1 c\u1ed1 li\u00ean k\u1ebft (link failures)<\/p><\/li><li><p>Kh\u00f4ng kh\u1edbp t\u1ed1c \u0111\u1ed9<\/p><\/li><li><p>Nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng qu\u00e1 m\u1ee9c<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP ph\u1ed5 bi\u1ebfn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t g\u00e2y ra l\u1ed7i li\u00ean k\u1ebft switch. Ngay c\u1ea3 khi hai module SFP tr\u00f4ng gi\u1ed1ng nhau v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, ch\u00fang v\u1eabn c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau do s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u1ed1c \u0111\u1ed9, m\u00e3 h\u00f3a nh\u00e0 s\u1ea3n xu\u1ea5t, chu\u1ea9n Ethernet, b\u01b0\u1edbc s\u00f3ng ho\u1eb7c kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 b\u1edfi firmware switch. Tr\u01b0\u1edbc khi <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/10g-sfp-plus-module-installation-operation-precautions\/\">l\u1eafp \u0111\u1eb7t module SFP<\/a>, lu\u00f4n x\u00e1c minh t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi switch, t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 v\u00e0 y\u00eau c\u1ea7u lo\u1ea1i c\u00e1p.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565.jpg\" alt=\"Common SFP Compatibility Problems\" class=\"wp-image-7309\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/86bab673ba8f44f7b8e3c4b9b5342565-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ea5t k\u1ef3 module SFP n\u00e0o c\u0169ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u1ecdi switch<\/p><\/li><li><p>SFP v\u00e0 SFP+ ho\u00e0n to\u00e0n ho\u00e1n \u0111\u1ed5i cho nhau<\/p><\/li><li><p>\u0110\u1ea7u n\u1ed1i kh\u1edbp nhau \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean th\u1ef1c t\u1ebf, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\">SFP c\u1ee7a b\u00ean th\u1ee9 ba<\/a> \u0111i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea3 h\u1ed7 tr\u1ee3 ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Speed Mismatch Problems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 tr\u1ed9n l\u1eabn c\u00e1c chu\u1ea9n t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t module SFP+ 10G th\u01b0\u1eddng s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u1ed5ng SFP 1G<\/p><\/li><li><p>M\u1ed9t s\u1ed1 c\u1ed5ng SFP+ h\u1ed7 tr\u1ee3 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/488468.htm\">Tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, c\u00e1c c\u1ed5ng SFP+ h\u1ed7 tr\u1ee3 t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c v\u1edbi<\/a>, nh\u01b0ng kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c switch \u0111\u1ec1u cho ph\u00e9p \u0111i\u1ec1u n\u00e0y<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c chu\u1ea9n t\u1ed1c \u0111\u1ed9 ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 312px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"312\"><p>Lo\u1ea1i c\u1ed5ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"312\"><p>SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1Gbps<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"312\"><p>SFP+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10 Gbps<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"312\"><p>SFP28<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>25 Gbps<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ed5ng switch<\/p><\/li><li><p>T\u1ed1c \u0111\u1ed9 module \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 t\u1ef1 th\u01b0\u01a1ng l\u01b0\u1ee3ng (auto-negotiation)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Vendor Compatibility Restrictions<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u nh\u00e0 cung c\u1ea5p switch s\u1eed d\u1ee5ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-eeprom-powers-sfp-and-qsfp-optical-modules\/\">M\u00e3 h\u00f3a EEPROM<\/a> \u0111\u1ec3 x\u00e1c minh c\u00e1c module SFP \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c module b\u00ean th\u1ee9 ba kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t c\u1ea3nh b\u00e1o<\/p><\/li><li><p>M\u1ed9t s\u1ed1 switch c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a ho\u00e0n to\u00e0n c\u00e1c module quang kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ed5 bi\u1ebfn trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Cisco<\/p><\/li><li><p>HPE<\/p><\/li><li><p>Juniper<br><\/p><\/li><li><p>C\u00e1c switch doanh nghi\u1ec7p Arista<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong m\u1ed9t s\u1ed1 m\u00f4i tr\u01b0\u1eddng, c\u00e1c module t\u01b0\u01a1ng th\u00edch <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475770.htm\">c\u00e1c m\u00f4-\u0111un b\u00ean th\u1ee9 ba<br><\/a> ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c, nh\u01b0ng c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt firmware \u0111\u00f4i khi c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u00e0nh vi h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Fiber and Wavelength Mismatch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c li\u00ean k\u1ebft quang c\u0169ng y\u00eau c\u1ea7u th\u00f4ng s\u1ed1 quang h\u1ecdc kh\u1edbp nhau \u1edf c\u1ea3 hai \u0111\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Sai l\u1ec7ch gi\u1eefa s\u1ee3i \u0111\u01a1n mode v\u00e0 \u0111a mode<\/p><\/li><li><p>C\u00e1c b\u01b0\u1edbc s\u00f3ng quang kh\u00e1c nhau<\/p><\/li><li><p>Lo\u1ea1i \u0111\u1ea7u n\u1ed1i kh\u00f4ng \u0111\u00fang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t module <a target=\"\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">LX 1310 nm<\/a> c\u00f3 th\u1ec3 kh\u00f4ng k\u1ebft n\u1ed1i \u0111\u00fang c\u00e1ch v\u1edbi module <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478230.htm\">SX 850 nm<\/a><\/p><\/li><li><p>S\u1ee3i \u0111a mode kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c thi\u1ebft b\u1ecb quang \u0111\u01a1n mode \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >DAC and Cable Compatibility Issues<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00e1p DAC kh\u00f4ng t\u01b0\u01a1ng th\u00edch ph\u1ed5 qu\u00e1t tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 n\u1ec1n t\u1ea3ng switch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 switch y\u00eau c\u1ea7u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c c\u00e1p DAC \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1edfi nh\u00e0 s\u1ea3n xu\u1ea5t<\/p><\/li><li><p>\u0110\u1ed9 d\u00e0i c\u00e1p c\u1ee5 th\u1ec3<\/p><\/li><li><p>C\u00e1c lo\u1ea1i c\u00e1p DAC th\u1ee5 \u0111\u1ed9ng ho\u1eb7c ch\u1ee7 \u0111\u1ed9ng \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p DAC kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p><\/li><li><p>T\u1eaft c\u1ed5ng<\/p><\/li><li><p>M\u1ea5t g\u00f3i d\u1eef li\u1ec7u ng\u1eaft qu\u00e3ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1ch tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi mua module SFP, h\u00e3y x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ma tr\u1eadn t\u01b0\u01a1ng th\u00edch switch<\/p><\/li><li><p>C\u00e1c ti\u00eau chu\u1ea9n Ethernet \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Y\u00eau c\u1ea7u v\u1ec1 lo\u1ea1i s\u1ee3i quang v\u00e0 \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n t\u1ea3i<\/p><\/li><li><p>Y\u00eau c\u1ea7u m\u00e3 h\u00f3a c\u1ee7a nh\u00e0 cung c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc khi tri\u1ec3n khai c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c l\u1ea7n c\u00e0i \u0111\u1eb7t th\u1ea5t b\u1ea1i<\/p><\/li><li><p>Th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft uplink kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li><li><p>Chi ph\u00ed thay th\u1ebf kh\u00f4ng c\u1ea7n thi\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u, vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch t\u01b0\u01a1ng th\u00edch chu\u1ea9n h\u00f3a l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i quang v\u00e0 Ethernet \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u23e9 Khi n\u00e0o b\u1ea1n n\u00ean s\u1eed d\u1ee5ng c\u1ed5ng SFP thay v\u00ec c\u1ed5ng Ethernet?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n n\u00ean s\u1eed d\u1ee5ng c\u1ed5ng SFP thay v\u00ec c\u1ed5ng Ethernet RJ45 ti\u00eau chu\u1ea9n khi m\u1ea1ng c\u1ee7a b\u1ea1n y\u00eau c\u1ea7u kho\u1ea3ng c\u00e1ch truy\u1ec1n t\u1ea3i xa h\u01a1n, k\u1ebft n\u1ed1i quang h\u1ecdc, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng cao h\u01a1n ho\u1eb7c c\u00e1c t\u00f9y ch\u1ecdn ph\u01b0\u01a1ng ti\u1ec7n linh ho\u1ea1t. C\u00e1c c\u1ed5ng SFP th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho k\u1ebft n\u1ed1i uplink gi\u1eefa c\u00e1c switch, li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u, m\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng trong khu\u00f4n vi\u00ean tr\u01b0\u1eddng ho\u1eb7c c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u00e0 c\u00e1p quang mang l\u1ea1i hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n so v\u1edbi c\u00e1p Ethernet \u0111\u1ed3ng truy\u1ec1n th\u1ed1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149.jpg\" alt=\"When Should You Use an SFP Port Instead of Ethernet?\" class=\"wp-image-7310\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8d40d5a89e2744c38b0b06a0836f1149-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u1ea7u h\u1ebft c\u00e1c m\u1ea1ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng RJ45 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i<\/p><\/li><li><p>C\u1ed5ng SFP \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c k\u1ebft n\u1ed1i uplink v\u00e0 backbone<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">L\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u ph\u1ee5 thu\u1ed9c v\u00e0o <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-distance-real-world-range-optics-explained\/\">kho\u1ea3ng c\u00e1ch<br><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/what-is-data-bandwidth\/\">b\u0103ng th\u00f4ng<br><\/a>, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 m\u00f4i tr\u01b0\u1eddng tri\u1ec3n khai.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1eed d\u1ee5ng c\u1ed5ng SFP cho c\u00e1c k\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch xa<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ebft n\u1ed1i Ethernet \u0111\u1ed3ng ti\u00eau chu\u1ea9n th\u01b0\u1eddng b\u1ecb gi\u1edbi h\u1ea1n \u1edf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>100 m\u00e9t tr\u00ean c\u00e1p Cat5e\/Cat6<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP quang c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u00e0ng tr\u0103m m\u00e9t v\u1edbi s\u1ee3i \u0111a mode<\/p><\/li><li><p>V\u00e0i kil\u00f4m\u00e9t v\u1edbi s\u1ee3i \u0111\u01a1n mode<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y khi\u1ebfn c\u1ed5ng SFP tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u00f2a nh\u00e0<\/p><\/li><li><p>M\u1ea1ng tr\u01b0\u1eddng h\u1ecdc<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP)<\/p><\/li><li><p>Tri\u1ec3n khai Ethernet c\u00f4ng nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1eed d\u1ee5ng c\u1ed5ng SFP cho m\u1ea1ng quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft n\u1ed1i quang s\u1ee3i mang l\u1ea1i m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m so v\u1edbi Ethernet \u0111\u1ed3ng tr\u1ee5c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1t h\u01a1n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-electromagnetic-interference\/\">EMI<\/a> kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u<\/p><\/li><li><p>T\u1ed5n hao t\u00edn hi\u1ec7u th\u1ea5p h\u01a1n tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng b\u0103ng th\u00f4ng cao h\u01a1n<\/p><\/li><li><p>C\u00e1ch ly \u0111i\u1ec7n t\u1ed1t h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed5ng SFP quang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng doanh nghi\u1ec7p<\/p><\/li><li><p>```html<\/p><\/li><li><p>H\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t<\/p><\/li><li><p><p>1. Data centers<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>2. Surveillance systems<\/p>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" ><p>3. Manufacturing environments<\/p><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><p>4. In high-interference environments, fiber often provides more stable connectivity than copper Ethernet.<\/p>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><p>5. Use SFP Ports for Flexible Network Upgrades<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>6. One major advantage of SFP ports is modularity.<\/p><\/p><\/li><li><p><p>7. Instead of replacing the entire switch, administrators can:<\/p><\/p><\/li><li><p><p>8. Upgrade transceiver modules<\/p><\/p><\/li><li><p><p>9. Change fiber types<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>10. Increase transmission distance<\/p>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>11. Migrate from 1Gb to 10Gb networking<\/p><\/p><\/li><li><p><p>12. This flexibility simplifies long-term network expansion.<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" ><p>13. A switch may initially use 1G SFP uplinks<\/p><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><p>14. Later upgraded to 10G SFP+ connections using compatible hardware<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>15. When RJ45 Ethernet Ports Are Better<\/p><\/p><\/li><li><p><p>16. RJ45 Ethernet ports are usually the better choice for:<\/p><\/p><\/li><li><p><p>17. PCs and printers<\/p><\/p><\/li><li><p><p>18. Office endpoint devices<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>19. Short-distance connections<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>20. Lower-cost deployments<\/p><\/p><\/li><li><p><p>21. Copper Ethernet is simpler because:<\/p><\/p><\/li><li><p><p>22. No transceiver modules are required<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>23. Cabling is widely available<\/p>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" ><p>24. Installation costs are lower<\/p><\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>C\u1ed5ng SFP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><p>25. For many small office networks, standard RJ45 switching is sufficient.<\/p><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>26. SFP vs. Ethernet: Quick Comparison<\/p><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>27. RJ45 Ethernet Port<\/p><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>28. Fiber or copper<\/p><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u01b0\u1eddng l\u00e0 100 m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><p>29. Copper Ethernet<\/p><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>30. Up to kilometers<\/p><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>31. Modularity<\/p><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>32. Replaceable transceivers<\/p><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Trung b\u00ecnh<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>K\u1ebft n\u1ed1i kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Li\u00ean k\u1ebft l\u00ean (uplink) v\u00e0 li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><p>33. Fixed interface<\/p><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><p>34. Excellent with fiber<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>35. Endpoint devices<\/p><\/p><\/li><li><p><p>36. In modern enterprise networks, switches often combine:<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>37. RJ45 access ports<\/p>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><p>38. SFP uplink ports<\/p><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><p>39. This hybrid design provides both cost efficiency and scalable high-speed connectivity.<\/p>.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4.jpg\" alt=\"Choosing the Right SFP Port Setup\" class=\"wp-image-7311\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/908543ef8d004373abdfa56c5bf51ec4-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><p>41. SFP ports give modern network switches the flexibility to support both fiber optic and copper Ethernet connectivity through interchangeable transceiver modules. Whether you are building a small office network, upgrading a data center, or deploying long-distance fiber uplinks, understanding how SFP ports work helps prevent compatibility problems and improves long-term scalability.<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><p>42. Choosing the Right SFP Port Setup<\/p><\/p><\/li><li><p><p>43. In most real-world deployments:<\/p><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><p>44. RJ45 Ethernet ports are used for endpoint devices<\/p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Kho\u1ea3ng c\u00e1ch truy\u1ec1n t\u1ea3i<\/p><\/li><li><p><p>45. SFP ports are used for uplinks, backbone links, and high-speed interconnects<\/p><\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u1eb1ng s\u1ee3i \u0111ai ho\u1eb7c b\u1eb1ng \u0111\u1ed3ng<\/p><\/li><li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch<\/p><\/li><li><p>Y\u00eau c\u1ea7u n\u00e2ng c\u1ea5p t\u01b0\u01a1ng lai<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Module SFP b\u1eb1ng s\u1ee3i \u0111ai l\u00fd t\u01b0\u1edfng cho m\u00f4i tr\u01b0\u1eddng xa l\u1ed9 v\u00e0 nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u \u0111i\u1ec7n\u78c1<\/p><\/li><li><p>Module SFP b\u1eb1ng c\u00e1p \u0111\u1ed3ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi c\u00e1p Ethernet hi\u1ec7n c\u00f3<\/p><\/li><li><p>C\u00e1p DAC l\u00e0 l\u1ef1a ch\u1ecdn ti\u1ebft ki\u1ec7m chi ph\u00ed cho k\u1ebft n\u1ed1i rack-to-rack ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi mua module SFP, h\u00e3y x\u00e1c nh\u1eadn tr\u01b0\u1edbc:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Compatibility v\u1ec1 t\u1ed1c \u0111\u1ed9 c\u1ed5ng<\/p><\/li><li><p>Standards h\u1ed7 tr\u1ee3<\/p><\/li><li><p>Y\u00eau c\u1ea7u v\u1ec1 lo\u1ea1i s\u1ee3i quang v\u00e0 \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>H\u01b0\u1edbng d\u1eabn t\u01b0\u01a1ng th\u00edch nh\u00e0 cung c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tri\u1ec3n khai m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd module SFP c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Scalability m\u1ea1ng<\/p><\/li><li><p>Performance uplink<\/p><\/li><li><p>Flexibility c\u00e1p<\/p><\/li><li><p>Hi\u1ec7u qu\u1ea3 l\u00e2u d\u00e0i trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476089.htm\">c\u00e1c module SFP t\u01b0\u01a1ng th\u00edch<\/a>, c\u00e1c transceiver SFP b\u1eb1ng c\u00e1p \u0111\u1ed3ng, c\u00e1p DAC ho\u1eb7c c\u00e1c gi\u1ea3i ph\u00e1p k\u1ebft n\u1ed1i m\u1ea1ng doanh nghi\u1ec7p, th\u00ec <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a> cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c s\u1ea3n ph\u1ea9m fiber v\u00e0 Ethernet thi\u1ebft k\u1ebf cho c\u00e1c thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch, router, m\u1ea1ng c\u00f4ng nghi\u1ec7p v\u00e0 \u1ee9ng d\u1ee5ng\u6570\u636e\u4e2d\u5fc3.<\/p>","protected":false},"excerpt":{"rendered":"<p>C\u1ed5ng SFP tr\u00ean switch l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u00e1ch c\u1ed5ng SFP h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i quang v\u00e0 Ethernet, so s\u00e1nh v\u1edbi RJ45 v\u00e0 SFP+, c\u0169ng nh\u01b0 l\u1ef1a ch\u1ecdn m\u00f4-\u0111un ph\u00f9 h\u1ee3p.<\/p>","protected":false},"author":1,"featured_media":7312,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-7313","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7313","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=7313"}],"version-history":[{"count":11,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7313\/revisions"}],"predecessor-version":[{"id":10682,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/7313\/revisions\/10682"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/7312"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=7313"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=7313"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=7313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}