{"id":4262,"date":"2025-10-22T11:12:00","date_gmt":"2025-10-22T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/vlan-network-segmentation-security-management-basics\/"},"modified":"2026-06-22T06:04:25","modified_gmt":"2026-06-22T06:04:25","slug":"vlan-network-segmentation-security-management-basics","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/vlan-network-segmentation-security-management-basics","title":{"rendered":"Gi\u1ea3i m\u00e3 VLAN (M\u1ea1ng LAN \u1ea3o): H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ea1ng th\u00f4ng minh v\u00e0 an to\u00e0n h\u01a1n"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a.webp\" alt=\"VLAN\" class=\"wp-image-4260\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b64e659e94bf416996e0d8722f75763a-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi m\u1ea1ng, s\u1ef1 \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn h\u1ed7n lo\u1ea1n. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t v\u0103n ph\u00f2ng n\u01a1i m\u1ecdi cu\u1ed9c tr\u00f2 chuy\u1ec7n\u2014t\u1eeb t\u00e0i ch\u00ednh v\u00e0 nh\u00e2n s\u1ef1 \u0111\u1ebfn \u0111\u1ed9i marketing\u2014\u0111\u1ec1u di\u1ec5n ra trong m\u1ed9t c\u0103n ph\u00f2ng l\u1edbn duy nh\u1ea5t. \u00c2m thanh s\u1ebd tr\u1edf n\u00ean kh\u00f3 ch\u1ecbu \u0111\u1ebfn m\u1ee9c kh\u00f4ng th\u1ec3 ch\u1ecbu n\u1ed5i, v\u00e0 th\u00f4ng tin nh\u1ea1y c\u1ea3m s\u1ebd li\u00ean t\u1ee5c \u0111\u1ed1i m\u1eb7t v\u1edbi nguy c\u01a1 b\u1ecb r\u00f2 r\u1ec9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y ch\u00ednh x\u00e1c l\u00e0 c\u00e1ch m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9 truy\u1ec1n th\u1ed1ng, ph\u1eb3ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/local-area-network-lan-modern-networking-fast-secure-connections\/\"><strong>M\u1ea1ng c\u1ee5c b\u1ed9 (LAN)<\/strong><\/a> ho\u1ea1t \u0111\u1ed9ng. Nh\u01b0ng \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng nh\u1eefng b\u1ee9c t\u01b0\u1eddng \u1ea3o b\u00ean trong c\u0103n ph\u00f2ng duy nh\u1ea5t \u0111\u00f3, t\u1ea1o ra c\u00e1c kh\u00f4ng gian ri\u00eang t\u01b0, an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 cho c\u00e1c nh\u00f3m kh\u00e1c nhau? \u0110\u00f3 ch\u00ednh l\u00e0 ph\u00e9p m\u00e0u c\u1ee7a m\u1ed9t <strong>M\u1ea1ng c\u1ee5c b\u1ed9 \u1ea3o (VLAN)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n n\u00e0y, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft <strong>VLAN l\u00e0 g\u00ec<\/strong>, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, nh\u1eefng l\u1ee3i \u00edch s\u00e2u s\u1eafc m\u00e0 n\u00f3 mang l\u1ea1i, c\u0169ng nh\u01b0 c\u00e1ch th\u1ee9c t\u00edch h\u1ee3p v\u1edbi ph\u1ea7n c\u1ee9ng hi\u1ec7n \u0111\u1ea1i, bao g\u1ed3m c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>b\u1ed9 thu ph\u00e1t quang<\/strong><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>A <strong>VLAN<\/strong> chia m\u1ed9t m\u1ea1ng th\u00e0nh c\u00e1c nh\u00f3m nh\u1ecf h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt v\u00e0 l\u00e0m cho vi\u1ec7c qu\u1ea3n l\u00fd d\u1ec5 d\u00e0ng h\u01a1n. N\u00f3 gi\u1eef an to\u00e0n cho d\u1eef li\u1ec7u quan tr\u1ecdng. \u0110\u1ed3ng th\u1eddi, n\u00f3 ki\u1ec3m so\u00e1t thi\u1ebft b\u1ecb n\u00e0o c\u00f3 th\u1ec3 giao ti\u1ebfp v\u1edbi thi\u1ebft b\u1ecb n\u00e0o.<\/p><\/li><li><p>G\u1eafn th\u1ebb VLAN \u0111\u1eb7t c\u00e1c ID \u0111\u1eb7c bi\u1ec7t l\u00ean c\u00e1c g\u00f3i d\u1eef li\u1ec7u. Vi\u1ec7c n\u00e0y \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi \u0111\u00fang \u0111\u1ebfn nh\u00f3m \u0111\u00edch. N\u00f3 ng\u0103n ch\u1eb7n vi\u1ec7c d\u1eef li\u1ec7u b\u1ecb tr\u1ed9n l\u1eabn gi\u1eefa c\u00e1c VLAN kh\u00e1c nhau.<\/p><\/li><li><p>VLAN gi\u00fap m\u1ea1ng ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n b\u1eb1ng c\u00e1ch gi\u1ea3m t\u1eafc ngh\u1ebdn l\u01b0u l\u01b0\u1ee3ng. M\u1ed7i VLAN x\u1eed l\u00fd lu\u1ed3ng d\u1eef li\u1ec7u ri\u00eang c\u1ee7a m\u00ecnh. \u0110i\u1ec1u n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n v\u00e0 th\u1eddi gian ch\u1edd ng\u1eafn h\u01a1n.<\/p><\/li><li><p>VLAN linh ho\u1ea1t v\u00e0 cho ph\u00e9p b\u1ea1n thay \u0111\u1ed5i nh\u00f3m thi\u1ebft b\u1ecb m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. B\u1ea1n kh\u00f4ng c\u1ea7n di chuy\u1ec3n c\u00e1p. B\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh m\u1ea1ng ch\u1ec9 b\u1eb1ng c\u00e1c thi\u1ebft l\u1eadp \u0111\u01a1n gi\u1ea3n.<\/p><\/li><li><p>C\u00f3 nhi\u1ec1u lo\u1ea1i VLAN kh\u00e1c nhau, v\u00ed d\u1ee5 nh\u01b0 VLAN d\u1ef1a tr\u00ean c\u1ed5ng v\u00e0 VLAN qu\u1ea3n tr\u1ecb. Nh\u1eefng lo\u1ea1i n\u00e0y gi\u00fap b\u1ea1n thi\u1ebft l\u1eadp m\u1ea1ng theo c\u00e1ch ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi nhu c\u1ea7u c\u1ee7a m\u00ecnh. H\u00e3y ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 VLAN (M\u1ea1ng c\u1ee5c b\u1ed9 \u1ea3o) l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>M\u1ea1ng c\u1ee5c b\u1ed9 \u1ea3o (VLAN)<\/strong> l\u00e0 m\u1ed9t m\u1ea1ng con logic, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1eb1ng ph\u1ea7n m\u1ec1m, chia m\u1ed9t c\u00f4ng t\u1eafc m\u1ea1ng v\u1eadt l\u00fd duy nh\u1ea5t th\u00e0nh nhi\u1ec1u mi\u1ec1n ph\u00e1t s\u00f3ng (broadcast domain) t\u00e1ch bi\u1ec7t. H\u00e3y h\u00ecnh dung n\u00f3 nh\u01b0 vi\u1ec7c t\u1ea1o ra nhi\u1ec1u c\u00f4ng t\u1eafc \u1ea3o \u0111\u1ed9c l\u1eadp b\u00ean trong m\u1ed9t thi\u1ebft b\u1ecb v\u1eadt l\u00fd duy nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c thi\u1ebft b\u1ecb tr\u00ean m\u1ed9t VLAN h\u00e0nh x\u1eed nh\u01b0 th\u1ec3 ch\u00fang \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u00e0o m\u1ed9t m\u1ea1ng chuy\u00ean d\u1ee5ng ri\u00eang, ngay c\u1ea3 khi ch\u00fang th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o c\u00f9ng m\u1ed9t c\u00f4ng t\u1eafc v\u1edbi c\u00e1c thi\u1ebft b\u1ecb thu\u1ed9c VLAN kh\u00e1c. S\u1ef1 c\u00f4 l\u1eadp n\u00e0y l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn c\u0103n b\u1ea3n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n \u0111o\u1ea1n m\u1ea1ng d\u1ef1a tr\u00ean ph\u1ea7n c\u1ee9ng truy\u1ec1n th\u1ed1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 VLAN ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? Ph\u00e9p m\u00e0u c\u1ee7a vi\u1ec7c g\u1eafn th\u1ebb 802.1Q<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00e0nh ph\u1ea7n b\u00ed m\u1eadt \u0111\u1eb1ng sau VLAN l\u00e0<br> <strong>ti\u00eau chu\u1ea9n IEEE 802.1Q<br><\/strong>, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 g\u1eafn th\u1ebb \u201cdot1q\u201d. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3n t\u00f3m t\u1eaft \u0111\u01a1n gi\u1ea3n h\u00f3a:<br><\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>G\u1eafn th\u1ebb khung (Frame Tagging):<br><\/strong> Khi m\u1ed9t thi\u1ebft b\u1ecb tr\u00ean VLAN g\u1eedi d\u1eef li\u1ec7u (m\u1ed9t khung Ethernet), b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng th\u00eam m\u1ed9t \u201cth\u1ebb\u201d \u0111\u1eb7c bi\u1ec7t d\u00e0i 4 byte v\u00e0o ti\u00eau \u0111\u1ec1 c\u1ee7a khung.<br>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>ID VLAN:<br><\/strong> Th\u1ebb n\u00e0y ch\u1ee9a m\u1ed9t th\u00f4ng tin quan tr\u1ecdng: <br> <strong>ID VLAN<br><\/strong> (m\u1ed9t s\u1ed1 trong kho\u1ea3ng t\u1eeb 1 \u0111\u1ebfn 4094). ID n\u00e0y x\u00e1c \u0111\u1ecbnh VLAN m\u00e0 khung thu\u1ed9c v\u1ec1.<br>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng (Traffic Steering):<br><\/strong> Khi khung \u0111\u00e3 g\u1eafn th\u1ebb di chuy\u1ec3n qua m\u1ea1ng, c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch kh\u00e1c \u0111\u1ecdc ID VLAN n\u00e0y v\u00e0 ch\u1ec9 chuy\u1ec3n ti\u1ebfp khung t\u1edbi c\u00e1c c\u1ed5ng l\u00e0 th\u00e0nh vi\u00ean c\u1ee7a c\u00f9ng m\u1ed9t VLAN.<br>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Lo\u1ea1i b\u1ecf th\u1ebb (Tag Removal):<br><\/strong> Khi khung \u0111\u1ebfn b\u1ed9 chuy\u1ec3n m\u1ea1ch \u0111\u00edch cu\u1ed1i c\u00f9ng, th\u1ebb 802.1Q s\u1ebd b\u1ecb g\u1ee1 b\u1ecf v\u00e0 khung g\u1ed1c \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1edbi thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i.<br>.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Quy tr\u00ecnh n\u00e0y cho ph\u00e9p m\u1ed9t li\u00ean k\u1ebft m\u1ea1ng v\u1eadt l\u00fd duy nh\u1ea5t truy\u1ec1n t\u1ea3i l\u01b0u l\u01b0\u1ee3ng cho nhi\u1ec1u VLAN \u0111\u1ed3ng th\u1eddi \u2014 kh\u00e1i ni\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 li\u00ean k\u1ebft<br> <strong>\u201ctrunk\u201d<br>\u201d<\/strong> <br>.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"992\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d.webp\" alt=\"VLAN \" class=\"wp-image-4261\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d-300x248.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d-1024x847.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d-768x635.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3bf149c80be14d9aacd5caf14b50ef0d-15x12.webp 15w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 C\u00e1c lo\u1ea1i VLAN ch\u00ednh<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 VLAN \u0111\u1ec1u gi\u1ed1ng nhau. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i kh\u00e1c nhau l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 c\u1ea5u h\u00ecnh v\u00e0 qu\u1ea3n l\u00fd<br> <strong>VLAN hi\u1ec7u qu\u1ea3<br><\/strong>. C\u00e1c ph\u00e2n lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0:<br><\/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 VLAN<br><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng ch\u00ednh<\/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\"><p><strong>VLAN d\u1eef li\u1ec7u (Data VLAN)<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n t\u1ea3i l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng do ng\u01b0\u1eddi d\u00f9ng t\u1ea1o ra.<br>.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u00e2n t\u00e1ch c\u00e1c ph\u00f2ng ban (v\u00ed d\u1ee5: K\u1ef9 thu\u1eadt so v\u1edbi Wi-Fi d\u00e0nh cho kh\u00e1ch).<br>.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>VLAN tho\u1ea1i (Voice VLAN)<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u01afu ti\u00ean l\u01b0u l\u01b0\u1ee3ng tho\u1ea1i qua IP (VoIP).<br>.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>D\u00e0nh ri\u00eang cho \u0111i\u1ec7n tho\u1ea1i IP nh\u1eb1m \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c g\u1ecdi v\u00e0 gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5.<br>.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>VLAN qu\u1ea3n tr\u1ecb (Management VLAN)<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n t\u1ea3i l\u01b0u l\u01b0\u1ee3ng h\u00e0nh ch\u00ednh \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng.<br>.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4 l\u1eadp truy c\u1eadp SSH\/HTTPS v\u00e0o c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn nh\u1eb1m t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt.<br>.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>VLAN m\u1eb7c \u0111\u1ecbnh (Default VLAN)<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>VLAN \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh s\u1eb5n m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c c\u1ed5ng chuy\u1ec3n m\u1ea1ch \u0111\u1ec1u thu\u1ed9c v\u1ec1 ngay khi kh\u1edfi t\u1ea1o (th\u01b0\u1eddng l\u00e0 VLAN 1).<br>.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u00e2y l\u00e0 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 b\u1ea3o m\u1eadt \u0111\u1ec3 t\u00e1i ph\u00e2n b\u1ed5 c\u00e1c c\u1ed5ng thay v\u00ec s\u1eed d\u1ee5ng VLAN m\u1eb7c \u0111\u1ecbnh.<br>.<\/strong><\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 Nh\u1eefng l\u1ee3i \u00edch n\u1ed5i b\u1eadt khi s\u1eed d\u1ee5ng VLAN<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec sao b\u1ea1n n\u00ean c\u00e2n nh\u1eafc tri\u1ec3n khai<br> <strong>VLAN<\/strong>? Nh\u1eefng \u01b0u \u0111i\u1ec3m mang t\u00ednh c\u00e1ch m\u1ea1ng c\u1ea3 v\u1ec1 b\u1ea3o m\u1eadt l\u1eabn hi\u1ec7u n\u0103ng.<br>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>B\u1ea3o m\u1eadt n\u00e2ng cao:<\/strong> C\u00f4 l\u1eadp d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m. V\u00ed d\u1ee5: M\u1ed9t VLAN c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng thanh to\u00e1n t\u1ea1i \u0111i\u1ec3m b\u00e1n h\u00e0ng (Point-of-Sale) trong c\u1eeda h\u00e0ng b\u00e1n l\u1ebb kh\u00f4ng th\u1ec3 b\u1ecb truy c\u1eadp b\u1edfi c\u00e1c thi\u1ebft b\u1ecb tr\u00ean m\u1ea1ng kh\u00e1ch c\u00f4ng c\u1ed9ng.<br>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Hi\u1ec7u n\u0103ng c\u1ea3i thi\u1ec7n:<\/strong> B\u1eb1ng c\u00e1ch gi\u1edbi h\u1ea1n l\u01b0u l\u01b0\u1ee3ng ph\u00e1t s\u00f3ng trong c\u00e1c nh\u00f3m logic nh\u1ecf h\u01a1n, VLAN gi\u1ea3m l\u01b0u l\u01b0\u1ee3ng kh\u00f4ng c\u1ea7n thi\u1ebft tr\u00ean to\u00e0n m\u1ea1ng, gi\u1ea3i ph\u00f3ng b\u0103ng th\u00f4ng v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 cho t\u1ea5t c\u1ea3 c\u00e1c \u1ee9ng d\u1ee5ng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Qu\u1ea3n l\u00fd m\u1ea1ng \u0111\u01a1n gi\u1ea3n h\u00f3a:<\/strong> Nh\u00f3m c\u00e1c thi\u1ebft b\u1ecb theo logic (theo ch\u1ee9c n\u0103ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i v\u1ecb tr\u00ed v\u1eadt l\u00fd) gi\u00fap vi\u1ec7c \u00e1p d\u1ee5ng ch\u00ednh s\u00e1ch, x\u1eed l\u00fd s\u1ef1 c\u1ed1 v\u00e0 c\u1ea5u h\u00ecnh l\u1ea1i m\u1ea1ng tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n di chuy\u1ec3n thi\u1ebft b\u1ecb v\u1eadt l\u00fd.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Hi\u1ec7u qu\u1ea3 chi ph\u00ed:<\/strong> VLAN \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u00e2n \u0111o\u1ea1n m\u1ea1ng m\u00e0 kh\u00f4ng y\u00eau c\u1ea7u c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u1eadt l\u00fd ri\u00eang bi\u1ec7t v\u00e0 h\u1ec7 th\u1ed1ng c\u00e1p ri\u00eang cho t\u1eebng nh\u00f3m, t\u1eeb \u0111\u00f3 mang l\u1ea1i kho\u1ea3n ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u00e1ng k\u1ec3.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 VLAN trong th\u1ef1c t\u1ebf: C\u1ed5ng truy c\u1eadp so v\u1edbi c\u1ed5ng trunk<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tri\u1ec3n khai VLAN th\u00e0nh c\u00f4ng, b\u1ea1n ph\u1ea3i hi\u1ec3u hai lo\u1ea1i c\u1ed5ng quan tr\u1ecdng sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>C\u1ed5ng truy c\u1eadp:<\/strong> K\u1ebft n\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i (nh\u01b0 m\u00e1y t\u00ednh ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i IP). N\u00f3 thu\u1ed9c v\u1ec1 <strong>m\u1ed9t, v\u00e0 ch\u1ec9 m\u1ed9t, VLAN d\u1eef li\u1ec7u<\/strong>. N\u00f3 x\u1eed l\u00fd c\u00e1c khung <strong>kh\u00f4ng c\u00f3 nh\u00e3n<\/strong> .<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u1ed5ng trunk:<\/strong> K\u1ebft n\u1ed1i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng (v\u00ed d\u1ee5: switch\u2013switch ho\u1eb7c switch\u2013router). N\u00f3 truy\u1ec1n t\u1ea3i l\u01b0u l\u01b0\u1ee3ng cho <strong>nhi\u1ec1u VLAN<\/strong> v\u00e0 s\u1eed d\u1ee5ng <strong>th\u1ebb 802.1Q<\/strong> \u0111\u1ec3 gi\u1eef ch\u00fang t\u00e1ch bi\u1ec7t.<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>\ud83d\udca1 M\u1eb9o chuy\u00ean gia<\/strong>: Khi l\u1eadp k\u1ebf ho\u1ea1ch chi\u1ebfn l\u01b0\u1ee3c ph\u00e2n \u0111o\u1ea1n m\u1ea1ng c\u1ee7a b\u1ea1n, h\u00e3y c\u00e2n nh\u1eafc ph\u1ea7n c\u1ee9ng ch\u1ea5t l\u01b0\u1ee3ng cao t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p nh\u01b0 <strong>LINK-PP<\/strong> c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c k\u1ebft n\u1ed1i trunk \u0111\u00e1ng tin c\u1eady v\u00e0 \u0111\u1ecbnh tuy\u1ebfn VLAN li\u1ec1n m\u1ea1ch tr\u00ean to\u00e0n b\u1ed9 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a b\u1ea1n.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 K\u1ebft n\u1ed1i c\u00e1c VLAN: Vai tr\u00f2 c\u1ee7a c\u00e1c switch l\u1edbp 3 v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Theo m\u1eb7c \u0111\u1ecbnh, c\u00e1c thi\u1ebft b\u1ecb trong m\u1ed9t <strong>VLAN<\/strong> kh\u00f4ng th\u1ec3 giao ti\u1ebfp v\u1edbi c\u00e1c thi\u1ebft b\u1ecb trong VLAN kh\u00e1c. \u0110\u00e2y l\u00e0 m\u1ed9t t\u00ednh n\u0103ng b\u1ea3o m\u1eadt c\u1ed1t l\u00f5i. Nh\u01b0ng n\u1ebfu b\u1ea1n c\u1ea7n giao ti\u1ebfp \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t th\u00ec sao? B\u1ea1n s\u1ebd c\u1ea7n m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng gi\u1eefa c\u00e1c m\u1ea1ng \u1ea3o n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 n\u01a1i <strong>B\u1ed9 chuy\u1ec3n m\u1ea1ch l\u1edbp 3<\/strong> or <strong>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/strong> xu\u1ea5t hi\u1ec7n. Ch\u00fang th\u1ef1c hi\u1ec7n <strong>\u201c\u0110\u1ecbnh tuy\u1ebfn gi\u1eefa c\u00e1c VLAN\u201d,\u201d<\/strong> \u0111\u00f3ng vai tr\u00f2 c\u1ed5ng k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c VLAN. Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt n\u00e2ng cao (ACL) t\u1ea1i \u0111i\u1ec3m \u0111\u1ecbnh tuy\u1ebfn n\u00e0y \u0111\u1ec3 ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p \u0111i qua gi\u1eefa c\u00e1c VLAN.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 M\u1edf r\u1ed9ng m\u1ea1ng c\u1ee7a b\u1ea1n: C\u00e1c b\u1ed9 thu ph\u00e1t quang (optical transceivers) \u0111\u00f3ng vai tr\u00f2 g\u00ec?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi m\u1ea1ng m\u1edf r\u1ed9ng, vi\u1ec7c k\u1ebft n\u1ed1i c\u00e1c switch gi\u1eefa c\u00e1c t\u1ea7ng ho\u1eb7c c\u00e1c t\u00f2a nh\u00e0 kh\u00e1c nhau tr\u1edf n\u00ean c\u1ea7n thi\u1ebft. Vi\u1ec7c n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fiber-optic-cable-what-it-is-and-how-it-works-explained\/\"><strong>c\u00e1p quang<\/strong><\/a> nh\u1edd v\u00e0o b\u0103ng th\u00f4ng cao, kho\u1ea3ng c\u00e1ch xa v\u00e0 kh\u1ea3 n\u0103ng mi\u1ec5n nhi\u1ec5m v\u1edbi nhi\u1ec5u \u0111i\u1ec7n. Tuy nhi\u00ean, c\u00e1c switch kh\u00f4ng th\u1ec3 t\u1ef1 g\u1eedi t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng \u2014 ch\u00fang c\u1ea7n m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>quang h\u1ecdc<\/strong> <strong>\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.<\/strong><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b\u1ed9 thu ph\u00e1t (transceiver), nh\u01b0 m\u1ed9t <strong>SFP+ (Y\u1ebfu t\u1ed1 h\u00ecnh d\u1ea1ng nh\u1ecf \u0111\u01b0\u1ee3c n\u00e2ng cao c\u00f3 th\u1ec3 c\u1eafm r\u1eddi)<\/strong>, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb nh\u1ecf g\u1ecdn, h\u1ed7 tr\u1ee3 c\u1eafm n\u00f3ng (hot-pluggable), c\u00f3 ch\u1ee9c n\u0103ng chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb switch th\u00e0nh t\u00edn hi\u1ec7u quang cho c\u00e1p s\u1ee3i quang. Khi thi\u1ebft l\u1eadp m\u1ed9t li\u00ean k\u1ebft trunk qua s\u1ee3i quang nh\u1eb1m m\u1edf r\u1ed9ng c\u00e1c VLAN c\u1ee7a b\u1ea1n gi\u1eefa hai ph\u00f2ng \u0111\u1ea5u n\u1ed1i (wiring closets), b\u1ea1n s\u1ebd l\u1eafp \u0111\u1eb7t m\u1ed9t b\u1ed9 thu ph\u00e1t t\u01b0\u01a1ng th\u00edch v\u00e0o m\u1ed7i switch \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, \u0111\u1ec3 t\u1ea1o m\u1ed9t li\u00ean k\u1ebft trunk s\u1ee3i quang t\u1ed1c \u0111\u1ed9 cao 10GbE nh\u1eb1m truy\u1ec1n t\u1ea3i nhi\u1ec1u VLAN, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t b\u1ed9 thu ph\u00e1t <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\"><strong>SFP-10G-SR<br><\/strong><\/a> \u0111\u00e1ng tin c\u1eady. M\u1eabu c\u1ee5 th\u1ec3 n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho <strong>(SX) module designed for distances up to ~550 meters.<\/strong> c\u00e1c k\u1ebft n\u1ed1i qua <strong>s\u1ee3i quang \u0111a mode (multi-mode fiber)<\/strong>, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p ho\u00e0n h\u1ea3o v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c li\u00ean k\u1ebft n\u1ed9i b\u1ed9 t\u00f2a nh\u00e0, \u0111\u1ea3m b\u1ea3o ki\u1ebfn tr\u00fac VLAN c\u1ee7a b\u1ea1n lu\u00f4n nh\u1ea5t qu\u00e1n v\u00e0 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 tr\u00ean to\u00e0n b\u1ed9 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>\ud83d\udccc \u0110\u00e3 s\u1eb5n s\u00e0ng x\u00e2y d\u1ef1ng m\u1ed9t m\u1ea1ng l\u01b0\u1edbi v\u1eefng ch\u1eafc v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng?<\/strong> Kh\u00e1m ph\u00e1 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a>\u2018d\u1ea3i s\u1ea3n ph\u1ea9m \u0111\u1ea7y \u0111\u1ee7 c\u00e1c b\u1ed9 thu ph\u00e1t quang t\u01b0\u01a1ng th\u00edch c\u1ee7a <strong>SFP+, QSFP28 v\u00e0 c\u00e1c b\u1ed9 thu ph\u00e1t quang kh\u00e1c<\/strong> \u0111\u1ec3 t\u00ecm ra gi\u1ea3i ph\u00e1p ho\u00e0n h\u1ea3o \u0111\u00e1p \u1ee9ng nhu c\u1ea7u trunking t\u1ed1c \u0111\u1ed9 cao c\u1ee7a b\u1ea1n.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 K\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\"><strong>VLAN<\/strong> l\u00e0 c\u00f4ng ngh\u1ec7 b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng chuy\u00ean nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i. Ch\u00fang cung c\u1ea5p nh\u1eefng tr\u1ee5 c\u1ed9t n\u1ec1n t\u1ea3ng v\u1ec1 b\u1ea3o m\u1eadt, hi\u1ec7u n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ea7u t\u01b0 l\u1edbn v\u00e0o ph\u1ea7n c\u1ee9ng m\u1edbi. B\u1eb1ng c\u00e1ch ph\u00e2n \u0111o\u1ea1n m\u1ea1ng m\u1ed9t c\u00e1ch logic, b\u1ea1n \u0111\u1ea1t \u0111\u01b0\u1ee3c quy\u1ec1n ki\u1ec3m so\u00e1t chi ti\u1ebft \u0111\u1ed1i v\u1edbi lu\u1ed3ng d\u1eef li\u1ec7u, b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean quan tr\u1ecdng v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng, s\u1eb5n s\u00e0ng cho s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\">L\u00e0m ch\u1ee7 <strong>c\u1ea5u h\u00ecnh VLAN v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh b\u1ea3o m\u1eadt t\u1ed1t nh\u1ea5t<\/strong> l\u00e0 b\u01b0\u1edbc c\u01a1 b\u1ea3n thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi m\u1ecdi qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng nh\u1eb1m t\u1ed1i \u01b0u h\u00f3a m\u00f4i tr\u01b0\u1eddng c\u1ee7a h\u1ecd.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a VLAN l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n s\u1eed d\u1ee5ng VLAN \u0111\u1ec3 chia m\u1ea1ng c\u1ee7a m\u00ecnh th\u00e0nh c\u00e1c nh\u00f3m nh\u1ecf h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng v\u00e0 c\u1ea3i thi\u1ec7n vi\u1ec7c qu\u1ea3n l\u00fd m\u1ea1ng. M\u1ed7i nh\u00f3m gi\u1eef t\u00ednh t\u00e1ch bi\u1ec7t, nh\u1edd \u0111\u00f3 b\u1ea1n b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 t\u1ed5 ch\u1ee9c ch\u00fang m\u1ed9t c\u00e1ch khoa h\u1ecdc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Vi\u1ec7c g\u1eafn th\u1ebb VLAN (VLAN tagging) th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng g\u00ec trong qu\u1ea3n l\u00fd m\u1ea1ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">G\u1eafn th\u1ebb VLAN \u0111\u00e1nh d\u1ea5u m\u1ed7i g\u00f3i d\u1eef li\u1ec7u b\u1eb1ng m\u1ed9t ID duy nh\u1ea5t. Th\u1ebb n\u00e0y th\u00f4ng b\u00e1o cho c\u00e1c switch bi\u1ebft g\u00f3i d\u1eef li\u1ec7u thu\u1ed9c v\u1ec1 nh\u00f3m n\u00e0o. B\u1ea1n s\u1eed d\u1ee5ng g\u1eafn th\u1ebb VLAN \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd m\u1ea1ng v\u00e0 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u00fang \u0111\u1ebfn n\u01a1i c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >VLAN \u0111\u00f3ng vai tr\u00f2 g\u00ec trong qu\u1ea3n l\u00fd m\u1ea1ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">VLAN cho ph\u00e9p b\u1ea1n t\u1ed5 ch\u1ee9c c\u00e1c thi\u1ebft b\u1ecb theo ch\u1ee9c n\u0103ng ho\u1eb7c ph\u00f2ng ban. B\u1ea1n s\u1eed d\u1ee5ng \u0111i\u1ec1u n\u00e0y \u0111\u1ec3 l\u00e0m cho vi\u1ec7c qu\u1ea3n l\u00fd m\u1ea1ng tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n. B\u1ea1n c\u00f3 th\u1ec3 theo d\u00f5i l\u01b0u l\u01b0\u1ee3ng, ki\u1ec3m so\u00e1t truy c\u1eadp v\u00e0 ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1 nhanh h\u01a1n nh\u1edd c\u00e1c nh\u00f3m r\u00f5 r\u00e0ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng l\u1ee3i \u00edch khi s\u1eed d\u1ee5ng VLAN trong qu\u1ea3n l\u00fd m\u1ea1ng l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n, t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t t\u1ed1t h\u01a1n. VLAN gi\u00fap b\u1ea1n gi\u1eef c\u00e1c thi\u1ebft b\u1ecb \u1edf \u0111\u00fang nh\u00f3m. B\u1ea1n s\u1eed d\u1ee5ng VLAN \u0111\u1ec3 l\u00e0m cho vi\u1ec7c qu\u1ea3n l\u00fd m\u1ea1ng linh ho\u1ea1t v\u00e0 d\u1ec5 \u0111i\u1ec1u ch\u1ec9nh khi nhu c\u1ea7u c\u1ee7a b\u1ea1n thay \u0111\u1ed5i v\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ea1n n\u00ean ki\u1ec3m tra \u0111i\u1ec1u g\u00ec tr\u01b0\u1edbc khi th\u00eam VLAN v\u00e0o m\u1ea1ng c\u1ee7a m\u00ecnh?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u1ea7n ki\u1ec3m tra xem c\u00e1c switch v\u00e0 thi\u1ebft b\u1ecb c\u1ee7a m\u00ecnh c\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng VLAN hay kh\u00f4ng. B\u01b0\u1edbc n\u00e0y gi\u00fap b\u1ea1n tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u00e1t sinh trong qu\u1ea3n l\u00fd m\u1ea1ng. H\u00e3y \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd g\u1eafn th\u1ebb VLAN v\u00e0 t\u00e1ch bi\u1ec7t c\u00e1c nh\u00f3m.<\/p>","protected":false},"excerpt":{"rendered":"<p>VLAN ph\u00e2n \u0111o\u1ea1n m\u1ea1ng \u1edf t\u1ea7ng li\u00ean k\u1ebft d\u1eef li\u1ec7u, c\u1ea3i thi\u1ec7n t\u00ednh b\u1ea3o m\u1eadt, hi\u1ec7u n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd b\u1eb1ng c\u00e1ch c\u00f4 l\u1eadp c\u00e1c thi\u1ebft b\u1ecb trong c\u00e1c nh\u00f3m \u1ea3o.<\/p>","protected":false},"author":1,"featured_media":4260,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[13,14,18,24,26],"class_list":["post-4262","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-100g-modules","tag-10g-sfp-transceivers","tag-40g-qsfp-transceivers","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4262","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=4262"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4262\/revisions"}],"predecessor-version":[{"id":10986,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4262\/revisions\/10986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4260"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}