{"id":4448,"date":"2025-11-07T11:12:00","date_gmt":"2025-11-07T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-network-time-protocol-ntp-synchronization-guide\/"},"modified":"2026-06-22T05:24:19","modified_gmt":"2026-06-22T05:24:19","slug":"what-is-network-time-protocol-ntp-synchronization-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-network-time-protocol-ntp-synchronization-guide","title":{"rendered":"Giao th\u1ee9c Th\u1eddi Gian M\u1ea1ng (NTP) L\u00e0 G\u00ec"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1408\" height=\"768\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d.jpg\" alt=\"What Is Network Time Protocol NTP\" class=\"wp-image-4446\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d.jpg 1408w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d-300x164.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d-1024x559.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d-768x419.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/0ea2b32a1d7e4bc1a85a49486f6d1e8d-18x10.jpg 18w\" sizes=\"(max-width: 1408px) 100vw, 1408px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 si\u00eau k\u1ebft n\u1ed1i c\u1ee7a ch\u00fang ta, m\u1ed9t ph\u1ea7n gi\u00e2y c\u00f3 th\u1ec3 t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t giao d\u1ecbch t\u00e0i ch\u00ednh th\u00e0nh c\u00f4ng v\u00e0 m\u1ed9t kho\u1ea3n thua l\u1ed7 h\u00e0ng tri\u1ec7u \u0111\u00f4 la, ho\u1eb7c gi\u1eefa m\u1ed9t cu\u1ed9c g\u1ecdi video m\u01b0\u1ee3t m\u00e0 v\u00e0 m\u1ed9t tr\u1ea3i nghi\u1ec7m b\u1ecb gi\u1eadt, g\u00e2y kh\u00f3 ch\u1ecbu. L\u1ef1c l\u01b0\u1ee3ng v\u00f4 h\u00ecnh gi\u1eef cho \u0111\u1ed3ng h\u1ed3 trong v\u0169 tr\u1ee5 k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a ch\u00fang ta lu\u00f4n \u0111\u1ed3ng b\u1ed9 ho\u00e0n h\u1ea3o ch\u00ednh l\u00e0<br> <strong>Giao th\u1ee9c Th\u1eddi gian M\u1ea1ng (NTP)<\/strong>. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd l\u00e0m r\u00f5 v\u1ec1 NTP, gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, l\u00fd do v\u00ec sao n\u00f3 c\u1ef1c k\u1ef3 quan tr\u1ecdng, c\u0169ng nh\u01b0 vai tr\u00f2 h\u1ed7 tr\u1ee3 c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 <br> <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> hi\u1ec7u n\u0103ng cao trong vi\u1ec7c duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c n\u00e0y.<br>.<\/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><strong>Giao th\u1ee9c Th\u1eddi gian M\u1ea1ng (NTP)<\/strong> \u0111\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb \u0111\u1ec1u hi\u1ec3n th\u1ecb c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m. \u0110i\u1ec1u n\u00e0y gi\u00fap m\u1ecdi th\u1ee9 v\u1eadn h\u00e0nh tr\u01a1n tru c\u00f9ng nhau.<br>.<\/p><\/li><li><p>Vi\u1ec7c s\u1eed d\u1ee5ng NTP ng\u0103n ng\u1eeba sai s\u00f3t v\u00e0 nh\u1ea7m l\u1eabn. N\u00f3 \u0111\u1ed3ng b\u1ed9 h\u00f3a c\u00e1c \u0111\u1ed3ng h\u1ed3 \u2014 \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e1c v\u1ee5 nh\u01b0 l\u01b0u tr\u1eef h\u1ed3 s\u01a1 v\u00e0 \u0111\u1ea3m b\u1ea3o an ninh.<br>.<\/p><\/li><li><p>NTP ho\u1ea1t \u0111\u1ed9ng theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb giao ti\u1ebfp v\u1edbi nhau v\u00e0 duy tr\u00ec s\u1ef1 \u0111\u1ed3ng b\u1ed9.<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 Hi\u1ec3u nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n: NTP l\u00e0 g\u00ec?<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Giao th\u1ee9c Th\u1eddi gian M\u1ea1ng (NTP)<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng giao th\u1ee9c Internet l\u00e2u \u0111\u1eddi nh\u1ea5t v\u1eabn \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m<br> <strong>\u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ed3ng h\u1ed3 c\u1ee7a c\u00e1c m\u00e1y t\u00ednh tr\u00ean m\u1ea1ng<br><\/strong>. N\u00f3 cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb \u2014 t\u1eeb m\u00e1y t\u00ednh x\u00e1ch tay c\u1ee7a b\u1ea1n \u0111\u1ebfn c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 \u2014 ph\u1ed1i h\u1ee3p theo m\u1ed9t chu\u1ea9n th\u1eddi gian duy nh\u1ea5t, th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb c\u00e1c \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed c\u1ef1c k\u1ef3 ch\u00ednh x\u00e1c th\u00f4ng qua h\u1ec7 th\u1ed1ng<br> <strong>\u0110\u1ecbnh v\u1ecb To\u00e0n c\u1ea7u (GPS)<br><\/strong> ho\u1eb7c t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng c\u00f3 NTP, c\u00e1c h\u1ec7 th\u1ed1ng k\u1ebft n\u1ed1i m\u1ea1ng s\u1ebd d\u1ea7n l\u1ec7ch th\u1eddi gian nhau, d\u1eabn \u0111\u1ebfn h\u00e0ng lo\u1ea1t v\u1ea5n \u0111\u1ec1 nh\u01b0 h\u1ecfng d\u1eef li\u1ec7u, l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt v\u00e0 giao d\u1ecbch th\u1ea5t b\u1ea1i. \u0110\u00e2y ch\u00ednh l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady cho \u0111i\u1ec7n to\u00e1n hi\u1ec7n \u0111\u1ea1i.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 NTP ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? C\u01a1 ch\u1ebf \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NTP<\/strong> ho\u1ea1t \u0111\u1ed9ng theo ki\u1ebfn tr\u00fac kh\u00e1ch-ch\u1ee7 nh\u01b0ng s\u1eed d\u1ee5ng m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p, b\u00e1n ph\u00e2n l\u1edbp c\u00e1c ngu\u1ed3n \u0111\u1ed3ng h\u1ed3 g\u1ecdi l\u00e0<br> <strong>\u201cc\u1ea5p b\u1eadc\u201d<br>\u201d<\/strong>. C\u1ea5u tr\u00fac n\u00e0y ng\u0103n ch\u1eb7n vi\u1ec7c qu\u00e1 t\u1ea3i c\u00e1c ngu\u1ed3n th\u1eddi gian ch\u00ednh x\u00e1c nh\u1ea5t v\u00e0 t\u1ea1o n\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc, c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng.<br>.<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px 0px 8px;\"><strong>H\u1ec7 th\u1ed1ng C\u1ea5p b\u1eadc:<br><\/strong> H\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p n\u00e0y x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch so v\u1edbi \u0111\u1ed3ng h\u1ed3 tham chi\u1ebfu g\u1ed1c.<br>.<\/p><ul><li><p style=\"margin: 0px;\"><strong>C\u1ea5p b\u1eadc 0:<br><\/strong> \u0110\u00e2y l\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111o th\u1eddi gian \u0111\u1ed9 ch\u00ednh x\u00e1c cao, v\u00ed d\u1ee5 nh\u01b0 \u0111\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed ho\u1eb7c b\u1ed9 thu GPS. Ch\u00fang kh\u00f4ng k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u00e0o m\u1ea1ng.<br>.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u1ea5p b\u1eadc 1:<\/strong> C\u00e1c m\u00e1y ch\u1ee7 n\u00e0y \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi thi\u1ebft b\u1ecb Stratum 0. Ch\u00fang l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 th\u1eddi gian m\u1ea1ng ch\u00ednh.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Stratum 2:<\/strong> C\u00e1c m\u00e1y ch\u1ee7 n\u00e0y \u0111\u1ed3ng b\u1ed9 v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 Stratum 1. Ch\u00fang truy v\u1ea5n nhi\u1ec1u m\u00e1y ch\u1ee7 Stratum 1 \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/p><\/li><li><p style=\"margin: 0px;\">Ph\u00e2n c\u1ea5p ti\u1ebfp t\u1ee5c \u0111\u1ebfn Stratum 15, v\u1edbi m\u1ed7i c\u1ea5p \u0111\u1ed9 k\u00e9m ch\u00ednh x\u00e1c h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi c\u1ea5p \u0111\u1ed9 ngay tr\u00ean n\u00f3.<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px 0px 8px;\"><strong>Qu\u00e1 tr\u00ecnh \u0110\u1ed3ng b\u1ed9 h\u00f3a:<\/strong> M\u1ed9t m\u00e1y kh\u00e1ch NTP giao ti\u1ebfp v\u1edbi m\u1ed9t ho\u1eb7c nhi\u1ec1u m\u00e1y ch\u1ee7 \u0111\u1ec3 t\u00ednh to\u00e1n th\u1eddi gian ch\u00ednh x\u00e1c. N\u00f3 trao \u0111\u1ed5i c\u00e1c g\u00f3i tin c\u00f3 g\u1eafn d\u1ea5u th\u1eddi gian \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh:<\/p><ul><li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 l\u1ec7ch (Offset):<\/strong> S\u1ef1 ch\u00eanh l\u1ec7ch gi\u1eefa th\u1eddi gian c\u1ee7a m\u00e1y kh\u00e1ch v\u00e0 th\u1eddi gian c\u1ee7a m\u00e1y ch\u1ee7.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 tr\u1ec5 (Delay):<\/strong> \u0110\u1ed9 tr\u1ec5 m\u1ea1ng gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7.<\/p><\/li><\/ul><p style=\"margin: 8px 0px 0px;\">B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n tinh vi, NTP lo\u1ea1i b\u1ecf \u0111\u1ed9 jitter v\u00e0 c\u00e1c bi\u1ebfn thi\u00ean v\u1ec1 \u0111\u1ed9 tr\u1ec5 m\u1ea1ng \u0111\u1ec3 h\u1ed9i t\u1ee5 v\u1ec1 th\u1eddi gian ch\u00ednh x\u00e1c nh\u1ea5t. Qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra li\u00ean t\u1ee5c, lu\u00f4n th\u1ef1c hi\u1ec7n c\u00e1c \u0111i\u1ec1u ch\u1ec9nh nh\u1ecf nh\u1eb1m gi\u1eef \u0111\u1ed3ng b\u1ed9 \u0111\u1ed3ng h\u1ed3 m\u00e1y kh\u00e1ch. \u0110\u1ed1i v\u1edbi c\u00e1c t\u1ed5 ch\u1ee9c t\u00ecm ki\u1ebfm <strong>c\u1ea5u h\u00ecnh m\u00e1y ch\u1ee7 NTP \u0111\u00e1ng tin c\u1eady<\/strong>, quy tr\u00ecnh m\u1ea1nh m\u1ebd n\u00e0y l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u1ea1ng.<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng sau \u0111\u00e2y t\u00f3m t\u1eaft c\u00e1c m\u1ee9c Stratum NTP:<\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee9c Stratum<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>V\u00ed d\u1ee5<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 ch\u00ednh x\u00e1c \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>0<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng h\u1ed3 tham chi\u1ebfu ch\u00ednh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng h\u1ed3 nguy\u00ean t\u1eed, B\u1ed9 thu GPS<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u00b1 Nanogi\u00e2y<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>1<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng b\u1ed9 v\u1edbi Stratum 0<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e1y ch\u1ee7 th\u1eddi gian NTP chuy\u00ean d\u1ee5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u00b1 Micr\u00f4gi\u00e2y<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>2<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng b\u1ed9 v\u1edbi Stratum 1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e1y ch\u1ee7 m\u1ea1ng doanh nghi\u1ec7p<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u00b1 Miligi\u00e2y<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>3+<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed3ng b\u1ed9 v\u1edbi c\u00e1c m\u1ee9c Stratum cao h\u01a1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u1ea1m l\u00e0m vi\u1ec7c, Thi\u1ebft b\u1ecb ngo\u1ea1i vi<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u00b1 Miligi\u00e2y<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4.webp\" alt=\"Network Time Protocol\" class=\"wp-image-4447\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c413dc51b8ea45049ec18a3527a4b7e4-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 V\u00ec sao NTP l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady? H\u1eadu qu\u1ea3 khi m\u1ea5t \u0111\u1ed3ng b\u1ed9<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea7m quan tr\u1ecdng c\u1ee7a <strong>\u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian m\u1ea1ng ch\u00ednh x\u00e1c<\/strong> v\u01b0\u1ee3t xa vi\u1ec7c ch\u1ec9 \u0111\u01a1n thu\u1ea7n hi\u1ec3n th\u1ecb \u0111\u00fang th\u1eddi gian tr\u00ean m\u00e0n h\u00ecnh m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n. \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 n\u1ec1n t\u1ea3ng cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>B\u1ea3o m\u1eadt &amp; Tu\u00e2n th\u1ee7:<\/strong> C\u00e1c t\u1eadp tin nh\u1eadt k\u00fd t\u1eeb c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau (t\u01b0\u1eddng l\u1eeda, m\u00e1y ch\u1ee7, \u1ee9ng d\u1ee5ng) ph\u1ea3i c\u00f3 d\u1ea5u th\u1eddi gian nh\u1ea5t qu\u00e1n \u0111\u1ec3 ph\u1ee5c v\u1ee5 ph\u00e2n t\u00edch \u0111i\u1ec1u tra, ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ph\u00e1p l\u00fd (v\u00ed d\u1ee5: GDPR, HIPAA). N\u1ebfu kh\u00f4ng \u0111\u1ed3ng b\u1ed9, vi\u1ec7c li\u00ean k\u1ebft c\u00e1c s\u1ef1 ki\u1ec7n g\u1ea7n nh\u01b0 l\u00e0 b\u1ea5t kh\u1ea3 thi.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>D\u1ecbch v\u1ee5 t\u00e0i ch\u00ednh:<\/strong> Trong c\u00e1c s\u1edf giao d\u1ecbch ch\u1ee9ng kho\u00e1n v\u00e0 giao d\u1ecbch t\u1ea7n s\u1ed1 cao, d\u1ea5u th\u1eddi gian \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1ee9 t\u1ef1 c\u00e1c giao d\u1ecbch. M\u1ed9t sai l\u1ec7ch v\u00e0i miligi\u00e2y c\u00f3 th\u1ec3 quy\u1ebft \u0111\u1ecbnh giao d\u1ecbch n\u00e0o \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc, d\u1eabn \u0111\u1ebfn nh\u1eefng h\u1ec7 l\u1ee5y t\u00e0i ch\u00ednh nghi\u00eam tr\u1ecdng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u00e2n t\u00e1n &amp; \u0110i\u1ec7n to\u00e1n ph\u00e2n t\u00e1n:<\/strong> C\u00e1c h\u1ec7 th\u1ed1ng nh\u01b0 Hadoop v\u00e0 Kubernetes d\u1ef1a v\u00e0o \u0111\u1ed3ng h\u1ed3 \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ec3 s\u1eafp x\u1ebfp \u0111\u00fang th\u1ee9 t\u1ef1 c\u00e1c giao d\u1ecbch, duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u v\u00e0 qu\u1ea3n l\u00fd c\u1ee5m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Vi\u1ec5n th\u00f4ng &amp; 5G:<\/strong> Vi\u1ec7c ph\u00e2n chia m\u1ea1ng (network slicing), h\u1ed3 s\u01a1 chi ti\u1ebft cu\u1ed9c g\u1ecdi (CDR) v\u00e0 thanh to\u00e1n \u0111\u1ec1u y\u00eau c\u1ea7u th\u1eddi gian ch\u00ednh x\u00e1c \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang v\u00e0 c\u00f4ng b\u1eb1ng.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 V\u1ecb anh h\u00f9ng th\u1ea7m l\u1eb7ng: C\u00e1ch c\u00e1c module quang h\u1ed7 tr\u1ee3 NTP ch\u00ednh x\u00e1c<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 NTP \u0111\u1ea3m nhi\u1ec7m ph\u1ea7n m\u1ec1m v\u00e0 giao th\u1ee9c \u0111\u1ed3ng b\u1ed9 h\u00f3a, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng v\u1eadt l\u00fd ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u v\u1edbi \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 \u0111\u1ed9 trung th\u1ef1c cao. \u0110\u00e2y l\u00e0 n\u01a1i c\u00e1c module quang t\u1ed1c \u0111\u1ed9 cao <strong>module quang<br><\/strong> tr\u1edf n\u00ean then ch\u1ed1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><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>, ch\u1eb3ng h\u1ea1n nh\u01b0 SFP, SFP+ v\u00e0 QSFP28, \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00e1c b\u1ed9 thu ph\u00e1t chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb c\u00e1c switch m\u1ea1ng th\u00e0nh t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng \u0111\u1ec3 truy\u1ec1n qua <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>. Hi\u1ec7u n\u0103ng c\u1ee7a ch\u00fang \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1eef li\u1ec7u th\u1eddi gian do NTP v\u1eadn chuy\u1ec3n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 tr\u1ec5 th\u1ea5p l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t:<\/strong> \u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a NTP ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5 m\u1ea1ng (latency). C\u00e1c module quang ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 tr\u1ec5 x\u1eed l\u00fd t\u00edn hi\u1ec7u t\u1ed1i thi\u1ec3u, \u0111\u1ea3m b\u1ea3o c\u00e1c g\u00f3i tin ch\u1ee9a d\u1ea5u th\u1eddi gian NTP di chuy\u1ec3n gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 nhanh v\u00e0 \u1ed5n \u0111\u1ecbnh nh\u1ea5t c\u00f3 th\u1ec3.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u:<\/strong> Trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u quy m\u00f4 l\u1edbn ho\u1eb7c <strong>c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111i\u1ec7n to\u00e1n hi\u1ec7u n\u0103ng cao<\/strong>, vi\u1ec7c duy tr\u00ec t\u00edn hi\u1ec7u s\u1ea1ch v\u00e0 m\u1ea1nh tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. C\u00e1c module ch\u1ea5t l\u01b0\u1ee3ng k\u00e9m c\u00f3 th\u1ec3 g\u00e2y ra \u0111\u1ed9 gi\u1eadt (jitter) ho\u1eb7c l\u1ed7i, khi\u1ebfn NTP ph\u1ea3i n\u1ed7 l\u1ef1c nhi\u1ec1u h\u01a1n \u0111\u1ec3 l\u1ecdc ch\u00fang ra, t\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 m\u1ea1ng \u0111ang x\u00e2y d\u1ef1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u1ec1n v\u1eefng, vi\u1ec7c l\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n t\u1eeb nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e1ng tin c\u1eady l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c. V\u00ed d\u1ee5, t\u00edch h\u1ee3p module <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\"><strong>100G QSFP28<\/strong><\/a> quang v\u00e0o c\u00e1c switch l\u00f5i c\u1ee7a b\u1ea1n \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i b\u0103ng th\u00f4ng cao v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p\u2014y\u00eau c\u1ea7u thi\u1ebft y\u1ebfu \u0111\u1ec3 duy tr\u00ec vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a th\u1eddi gian <strong>NTP trong ph\u1ea1m vi d\u01b0\u1edbi m\u1ed9t miligi\u00e2y<\/strong> tr\u00ean to\u00e0n b\u1ed9 c\u1ea5u tr\u00fac m\u1ea1ng trung t\u00e2m d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y khi\u1ebfn <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a> tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng l\u1edbp v\u1eadt l\u00fd c\u1ee7a b\u1ea1n s\u1ebd kh\u00f4ng tr\u1edf th\u00e0nh \u0111i\u1ec3m ngh\u1ebdn \u0111\u1ed1i v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 m\u1eb7t th\u1eddi gian.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 C\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn cho NTP<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NTP<\/strong> r\u1ea5t ph\u1ed5 bi\u1ebfn. B\u1ea1n t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u00f3 m\u1ed7i ng\u00e0y, ngay c\u1ea3 khi b\u1ea1n kh\u00f4ng nh\u1eadn ra \u0111i\u1ec1u \u0111\u00f3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a n\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>Duy\u1ec7t web:<\/strong> Vi\u1ec7c b\u1ea3o m\u1eadt l\u01b0u l\u01b0\u1ee3ng web b\u1eb1ng ch\u1ee9ng ch\u1ec9 HTTPS\/SSL y\u00eau c\u1ea7u th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ec3 x\u00e1c th\u1ef1c ch\u1ee9ng ch\u1ec9.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>M\u00e1y ch\u1ee7 email:<\/strong> D\u1ea5u th\u1eddi gian (timestamp) tr\u00ean email r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 s\u1eafp x\u1ebfp v\u00e0 chuy\u1ec3n ph\u00e1t.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>H\u1ec7 th\u1ed1ng t\u1ec7p:<\/strong> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/network-attached-storage-what-it-is-and-how-it-works\/\"><strong>L\u01b0u tr\u1eef g\u1eafn m\u1ea1ng (NAS)<\/strong><\/a> v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y s\u1eed d\u1ee5ng th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ec3 qu\u1ea3n l\u00fd phi\u00ean b\u1ea3n t\u1ec7p v\u00e0 sao l\u01b0u.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ki\u1ec3m so\u00e1t giao th\u00f4ng h\u00e0ng kh\u00f4ng &amp; Ph\u00e1t s\u00f3ng:<\/strong> C\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p n\u00e0y \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian c\u1ef1c k\u1ef3 cao \u0111\u1ec3 ph\u1ed1i h\u1ee3p v\u00e0 l\u00ean l\u1ecbch.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 K\u1ebft lu\u1eadn: Th\u1eddi gian l\u00e0 n\u1ec1n t\u1ea3ng<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Giao th\u1ee9c Th\u1eddi gian M\u1ea1ng (NTP)<\/strong> l\u00e0 m\u1ed9t ki\u1ec7t t\u00e1c c\u1ee7a k\u1ef9 thu\u1eadt internet\u2014m\u1ed9t h\u1ec7 th\u1ed1ng \u00e2m th\u1ea7m, b\u1ec1n b\u1ec9 v\u00e0 c\u1ef1c k\u1ef3 ch\u00ednh x\u00e1c, gi\u1eef cho th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a ch\u00fang ta v\u1eadn h\u00e0nh tr\u01a1n tru. T\u1eeb vi\u1ec7c b\u1ea3o m\u1eadt d\u1eef li\u1ec7u \u0111\u1ebfn vi\u1ec7c h\u1ed7 tr\u1ee3 t\u00e0i ch\u00ednh to\u00e0n c\u1ea7u, vai tr\u00f2 c\u1ee7a n\u00f3 l\u00e0 kh\u00f4ng th\u1ec3 thi\u1ebfu. Khi m\u1ea1ng ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n v\u1edbi t\u1ed1c \u0111\u1ed9 cao h\u01a1n v\u00e0 nhu c\u1ea7u ng\u00e0y c\u00e0ng l\u1edbn, ph\u1ea7n c\u1ee9ng n\u1ec1n t\u1ea3ng\u2014bao g\u1ed3m c\u1ea3 c\u00e1c module quang \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o ch\u00ednh x\u00e1c\u2014s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c h\u1ed7 tr\u1ee3 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng n\u00e0y.<\/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\" >Tr\u00ecnh kh\u00e1ch NTP l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n s\u1eed d\u1ee5ng tr\u00ecnh kh\u00e1ch NTP \u0111\u1ec3 y\u00eau c\u1ea7u th\u1eddi gian ch\u00ednh x\u00e1c. Tr\u00ecnh kh\u00e1ch g\u1eedi y\u00eau c\u1ea7u t\u1edbi m\u00e1y ch\u1ee7. Tr\u00ecnh kh\u00e1ch nh\u1eadn d\u1eef li\u1ec7u th\u1eddi gian v\u00e0 c\u1eadp nh\u1eadt \u0111\u1ed3ng h\u1ed3 c\u1ee7a n\u00f3.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tr\u00ecnh kh\u00e1ch gi\u00fap thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p><\/li><li><p>B\u1ea1n th\u1ea5y tr\u00ecnh kh\u00e1ch ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u00e1y t\u00ednh, \u0111i\u1ec7n tho\u1ea1i v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00e1y ch\u1ee7 NTP l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 NTP \u0111\u1ec3 cung c\u1ea5p th\u1eddi gian ch\u00ednh x\u00e1c. M\u00e1y ch\u1ee7 l\u1eafng nghe c\u00e1c y\u00eau c\u1ea7u t\u1eeb tr\u00ecnh kh\u00e1ch. M\u00e1y ch\u1ee7 g\u1eedi d\u1eef li\u1ec7u th\u1eddi gian t\u1edbi tr\u00ecnh kh\u00e1ch.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>M\u00e1y ch\u1ee7 s\u1eed d\u1ee5ng c\u00e1c ngu\u1ed3n \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 gi\u1eef th\u1eddi gian lu\u00f4n ch\u00ednh x\u00e1c. B\u1ea1n ph\u1ee5 thu\u1ed9c v\u00e0o m\u00e1y ch\u1ee7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c tr\u00ean to\u00e0n m\u1ea1ng.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec x\u1ea3y ra khi tr\u00ecnh kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 kh\u00f4ng kh\u1edbp nhau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n s\u1ebd g\u1eb7p s\u1ef1 c\u1ed1 n\u1ebfu tr\u00ecnh kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 hi\u1ec3n th\u1ecb th\u1eddi gian kh\u00e1c nhau. Tr\u00ecnh kh\u00e1ch c\u00f3 th\u1ec3 ghi l\u1ea1i d\u1ea5u th\u1eddi gian sai. M\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 g\u00e2y nh\u1ea7m l\u1eabn trong nh\u1eadt k\u00fd (logs).<\/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>V\u1ea5n \u0111\u1ec1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u1ea2nh h\u01b0\u1edfng t\u1eeb ph\u00eda tr\u00ecnh kh\u00e1ch<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>\u1ea2nh h\u01b0\u1edfng t\u1eeb ph\u00eda m\u00e1y ch\u1ee7<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Ch\u00eanh l\u1ec7ch th\u1eddi gian<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u00ecnh kh\u00e1ch m\u1ea5t th\u1ee9 t\u1ef1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e1y ch\u1ee7 t\u1ea1o ra l\u1ed7i<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Nh\u1eadt k\u00fd sai<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u00ecnh kh\u00e1ch hi\u1ec3n th\u1ecb sai s\u00f3t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u00e1y ch\u1ee7 l\u00e0m r\u1ed1i d\u1eef li\u1ec7u<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u1ea7n c\u1ea3 tr\u00ecnh kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 ph\u1ea3i kh\u1edbp nhau \u0111\u1ec3 v\u1eadn h\u00e0nh m\u1ea1ng m\u1ed9t c\u00e1ch tr\u01a1n tru.<\/p>","protected":false},"excerpt":{"rendered":"<p>Giao th\u1ee9c Th\u1eddi Gian M\u1ea1ng \u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ed3ng h\u1ed3 c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb tr\u00ean to\u00e0n m\u1ea1ng, \u0111\u1ea3m b\u1ea3o th\u1eddi gian ch\u00ednh x\u00e1c cho t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u, b\u1ea3o m\u1eadt v\u00e0 ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru.<\/p>","protected":false},"author":1,"featured_media":4446,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[24,26],"class_list":["post-4448","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4448","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=4448"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4448\/revisions"}],"predecessor-version":[{"id":10917,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4448\/revisions\/10917"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4446"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}