{"id":18043,"date":"2022-02-14T20:40:00","date_gmt":"2022-02-14T13:40:00","guid":{"rendered":"https:\/\/speed.family\/?p=18043"},"modified":"2023-07-23T19:52:11","modified_gmt":"2023-07-23T12:52:11","slug":"round-trip-time","status":"publish","type":"post","link":"https:\/\/kiencang.net\/round-trip-time\/","title":{"rendered":"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT"},"content":{"rendered":"\n<p><strong>Round-trip time (RTT)<\/strong> \u0111o kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y (ms) m\u00e0 h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ea7n ph\u1ea3i b\u1ecf ra \u0111\u1ec3 m\u1ed9t y\u00eau c\u1ea7u m\u1ea1ng \u0111i t\u1eeb \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac r\u1ed3i quay tr\u1edf l\u1ea1i \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u (kh\u1ee9 h\u1ed3i, nh\u01b0 ki\u1ec3u v\u00e9 2 chi\u1ec1u \u0111\u00f3 c\u00e1c b\u1ea1n). <\/p>\n\n\n\n<p>RTT l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 m\u1ea1nh kh\u1ecfe c\u1ee7a k\u1ebft n\u1ed1i tr\u00ean m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9 ho\u1eb7c h\u1ec7 th\u1ed1ng l\u1edbn Internet, v\u00e0 \u0111\u00e2y th\u01b0\u1eddng l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb m\u1ea1ng ch\u1ea9n \u0111o\u00e1n t\u1ed1c \u0111\u1ed9 v\u00e0 m\u1ee9c \u0111\u1ed9 \u0111\u00e1ng tin c\u1eady c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng.<\/p>\n\n\n\n<p>Gi\u1ea3m thi\u1ec3u RTT l\u00e0 m\u1ed9t m\u1ee5c ti\u00eau quan tr\u1ecdng c\u1ee7a <a href=\"https:\/\/kiencang.net\/cdn-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">CDN<\/a>. C\u1ea3i thi\u1ec7n \u0111\u1ed9 tr\u1ec5 (latency) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng b\u1eb1ng c\u00e1ch gi\u1ea3m round-trip time v\u00e0 lo\u1ea1i b\u1ecf c\u00e1c tr\u01b0\u1eddng h\u1ee3p y\u00eau c\u1ea7u roundtrip, ch\u1eb3ng h\u1ea1n nh\u01b0 thay \u0111\u1ed5i ti\u00eau chu\u1ea9n <a href=\"https:\/\/kiencang.net\/chung-chi-ssl-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">TLS\/SSL handshake<\/a>.<\/p>\n\n\n\n<p>C\u00f4ng c\u1ee5 ping, c\u00f3 s\u1eb5n tr\u00ean h\u1ea7u h\u1ebft c\u00e1c m\u00e1y t\u00ednh (v\u1edbi h\u1ec7 \u0111i\u1ec1u h\u00e0nh Windows, b\u1ea1n nh\u1ea5n v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng Start b\u00ean g\u00f3c ngo\u00e0i c\u00f9ng d\u01b0\u1edbi b\u00ean tr\u00e1i r\u1ed3i g\u00f5 cmd v\u00e0o \u00f4 t\u00ecm ki\u1ebfm), l\u00e0 m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c d\u00f9ng \u0111\u1ec3 \u01b0\u1edbc t\u00ednh round-trip time. <\/p>\n\n\n\n<p>\u1ede d\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 v\u1ec1 m\u1ed9t v\u00e0i l\u1ea7n ping \u0111\u1ebfn Google v\u1edbi round-trip time trung b\u00ecnh \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u1edf cu\u1ed1i. L\u01b0u \u00fd r\u1eb1ng m\u1ed9t trong c\u00e1c th\u1eddi gian ping c\u00f3 gi\u00e1 tr\u1ecb 17,604ms &#8211; l\u00e0 cao nh\u1ea5t so v\u1edbi ph\u1ea7n c\u00f2n l\u1ea1i.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"661\" height=\"260\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/roundtrip-time.png\" alt=\"\" class=\"wp-image-18044\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/roundtrip-time.png 661w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/roundtrip-time-300x118.png 300w\" sizes=\"(max-width: 661px) 100vw, 661px\" \/><\/figure><\/div>\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d627ba018\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d627ba018\"  type=\"checkbox\" id=\"item-6577d627ba018\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/round-trip-time\/#Cach_round-trip_time_hoat_dong\" title=\"C\u00e1ch round-trip time ho\u1ea1t \u0111\u1ed9ng\">C\u00e1ch round-trip time ho\u1ea1t \u0111\u1ed9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/round-trip-time\/#Cac_yeu_to_anh_huong_den_RTT_la_gi\" title=\"C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT l\u00e0 g\u00ec?\">C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/round-trip-time\/#Lam_the_nao_CDN_cai_thien_RTT\" title=\"L\u00e0m th\u1ebf n\u00e0o CDN c\u1ea3i thi\u1ec7n RTT?\">L\u00e0m th\u1ebf n\u00e0o CDN c\u1ea3i thi\u1ec7n RTT?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/round-trip-time\/#Trai_nghiem_thuc_te\" title=\"Tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf\">Tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"cach-round-trip-time-ho\u1ea1t-d\u1ed9ng\"><span class=\"ez-toc-section\" id=\"Cach_round-trip_time_hoat_dong\"><\/span>C\u00e1ch round-trip time ho\u1ea1t \u0111\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Round-trip time \u0111\u1ea1i di\u1ec7n cho l\u01b0\u1ee3ng th\u1eddi gian m\u00e0 d\u1eef li\u1ec7u \u0111i m\u1ed9t v\u00f2ng kh\u1ee9 h\u1ed3i \u0111\u1ebfn \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c. Ch\u00fang ta s\u1ebd xem l\u1ea1i c\u00e2u chuy\u1ec7n t\u1eeb b\u00e0i vi\u1ebft b\u00e0n v\u1ec1 \u0111\u1ed9 tr\u1ec5 CDN, \u1edf \u0111\u00f3 gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng m\u1ed9t ng\u01b0\u1eddi d\u00f9ng \u1edf New York (Hoa K\u1ef3) mu\u1ed1n li\u00ean h\u1ec7 \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7 \u1edf Singapore (\u0110\u00f4ng Nam \u00c1).<\/p>\n\n\n\n<p>Khi ng\u01b0\u1eddi d\u00f9ng \u1edf New York th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u, l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n qua nhi\u1ec1u routers (b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn) kh\u00e1c nhau \u1edf nhi\u1ec1u v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee5 th\u1ec3 tr\u01b0\u1edbc khi k\u1ebft th\u00fac \u1edf m\u00e1y ch\u1ee7 t\u1ea1i Singapore. <\/p>\n\n\n\n<p>C\u00f2n m\u00e1y ch\u1ee7 \u1edf Singapore sau \u0111\u00f3 g\u1eedi m\u1ed9t ph\u1ea3n h\u1ed3i quay tr\u1edf l\u1ea1i th\u00f4ng qua Internet \u0111\u1ec3 \u0111\u1ebfn v\u1ecb tr\u00ed \u1edf New York. M\u1ed9t khi y\u00eau c\u1ea7u k\u1ebft th\u00fac \u1edf New York, m\u1ed9t \u01b0\u1edbc t\u00ednh th\u00f4 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean th\u1eddi gian c\u1ea7n ph\u1ea3i b\u1ecf ra \u0111\u1ec3 \u0111i m\u1ed9t v\u00f2ng kh\u1ee9 h\u1ed3i gi\u1eefa hai \u0111\u1ecba \u0111i\u1ec3m.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"737\" height=\"488\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/mot-vong-khu-hoi.png\" alt=\"Qu\u00e3ng \u0111\u01b0\u1eddng kh\u1ee9 h\u1ed3i c\u1ee7a m\u1ed9t y\u00eau c\u1ea7u m\u1ea1ng\" class=\"wp-image-18046\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/mot-vong-khu-hoi.png 737w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/mot-vong-khu-hoi-300x199.png 300w\" sizes=\"(max-width: 737px) 100vw, 737px\" \/><\/figure><\/div>\n\n\n<p>Ch\u00fang ta c\u1ea7n ph\u1ea3i nh\u1edb r\u1eb1ng, round-trip time l\u00e0 \u01b0\u1edbc t\u00ednh v\u00e0 kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1i g\u00ec ch\u1eafc ch\u1eafn ki\u1ec3u nh\u01b0 nh\u01b0 \u0111inh \u0111\u00f3ng c\u1ed9t; t\u00ecnh tr\u1ea1ng c\u1ee7a \u0111o\u1ea1n k\u1ebft n\u1ed1i gi\u1eefa hai v\u1ecb tr\u00ed c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo th\u1eddi gian, v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1eafc ngh\u1ebdn m\u1ea1ng c\u00f3 th\u1ec3 tham gia v\u00e0o v\u00e0 g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed5ng th\u1eddi gian l\u01b0u chuy\u1ec3n d\u1eef li\u1ec7u. <\/p>\n\n\n\n<p>D\u00f9 v\u1eady RTT v\u1eabn l\u00e0 ch\u1ec9 s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 bi\u1ebft k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n hay kh\u00f4ng, v\u00e0 n\u1ebfu c\u00f3 th\u00ec \u01b0\u1edbc t\u00ednh tr\u01b0\u1edbc \u0111\u01b0\u1ee3c kho\u1ea3ng th\u1eddi gian m\u00e0 n\u00f3 c\u1ea7n.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"cac-y\u1ebfu-t\u1ed1-\u1ea3nh-h\u01b0\u1edfng-d\u1ebfn-rtt-la-gi\"><span class=\"ez-toc-section\" id=\"Cac_yeu_to_anh_huong_den_RTT_la_gi\"><\/span>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u1ea5u tr\u00fac c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng, l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng, v\u00e0 kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd gi\u1eefa ngu\u1ed3n \u0111i v\u00e0 \u0111\u00edch \u0111\u1ebfn l\u00e0 c\u00e1c y\u1ebfu t\u1ed1 c\u00f3 kh\u1ea3 n\u0103ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT (\u0111\u00e2y l\u00e0 m\u1ed9t trong c\u00e1c l\u00fd do v\u00ec sao khi <a href=\"https:\/\/kiencang.net\/mua-hosting-cho-wordpress\/\" target=\"_blank\" rel=\"noreferrer noopener\">ch\u1ecdn mua hosting<\/a> th\u00ec th\u01b0\u1eddng c\u00e0ng g\u1ea7n v\u1edbi kh\u00e1ch truy c\u1eadp ch\u1ee7 y\u1ebfu c\u1ee7a b\u1ea1n th\u00ec c\u00e0ng t\u1ed1t).<\/p>\n\n\n\n<p><strong>Danh s\u00e1ch c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT:<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>B\u1ea3n ch\u1ea5t c\u1ee7a m\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eef li\u1ec7u<\/strong>: c\u00e1i c\u00e1ch m\u00e0 k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c t\u1ea1o ra \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i\/di chuy\u1ec3n; c\u00e1c k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua c\u00e1p quang (optical fiber) kh\u00e1c bi\u1ec7t v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua c\u00e1p \u0111\u1ed3ng (copper). T\u01b0\u01a1ng t\u1ef1, m\u1ed9t k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua m\u1ea1ng kh\u00f4ng d\u00e2y th\u01b0\u1eddng r\u1ea5t kh\u00e1c bi\u1ec7t so v\u1edbi k\u1ebft n\u1ed1i th\u00f4ng qua v\u1ec7 tinh.<\/li>\n\n\n\n<li><strong>L\u01b0u l\u01b0\u1ee3ng c\u1ee7a m\u1ea1ng LAN<\/strong>: l\u01b0\u1ee3ng truy c\u1eadp tr\u00ean m\u1ea1ng LAN c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 l\u00e0 n\u00fat th\u1eaft c\u1ed5 chai l\u00e0m b\u1ecb ngh\u1ebdn k\u1ebft n\u1ed1i tr\u01b0\u1edbc khi n\u00f3 c\u00f3 th\u1ec3 v\u01b0\u01a1n ra ngo\u00e0i \u0111\u1ec3 ti\u1ebfp x\u00fac v\u1edbi th\u1ebf gi\u1edbi Internet. L\u1ea5y v\u00ed d\u1ee5, n\u1ebfu nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u00f9ng s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 streaming video, round-trip time c\u00f3 th\u1ec3 b\u1ecb h\u1ea1n ch\u1ebf m\u1eb7c d\u00f9 m\u1ea1ng b\u00ean ngo\u00e0i c\u00f3 kh\u1ea3 n\u0103ng x\u1eed l\u00fd v\u00e0 \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/li>\n\n\n\n<li><strong>Server response time (<a href=\"https:\/\/kiencang.net\/ttfb-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a m\u00e1y ch\u1ee7 \/ TTFB<\/a>)<\/strong>: \u0111\u00e2y l\u00e0 kho\u1ea3ng th\u1eddi gian \u0111\u1ec3 m\u00e1y ch\u1ee7 x\u1eed l\u00fd v\u00e0 ph\u1ea3n h\u1ed3i m\u1ed9t y\u00eau c\u1ea7u v\u00e0 c\u00f3 th\u1ec3 l\u00e0 n\u00fat th\u1eaft c\u1ed5 chai g\u00e2y ra \u0111\u1ed9 tr\u1ec5 m\u1ea1ng. Khi m\u1ed9t m\u00e1y ch\u1ee7 b\u1ecb qu\u00e1 t\u1ea3i y\u00eau c\u1ea7u, ch\u1eb3ng h\u1ea1n trong th\u1eddi gian b\u1ecb <a href=\"https:\/\/kiencang.net\/ddos-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">t\u1ea5n c\u00f4ng DDoS<\/a>, kh\u1ea3 n\u0103ng ph\u1ea3n h\u1ed3i c\u1ee7a n\u00f3 b\u1ecb h\u1ea1n ch\u1ebf, v\u00e0 k\u1ebft qu\u1ea3 l\u00e0 l\u00e0m gia t\u0103ng RTT.<\/li>\n\n\n\n<li><strong>S\u1ed1 n\u00fat v\u00e0 t\u1eafc ngh\u1ebdn (congestion)<\/strong>: ph\u1ee5 thu\u1ed9c v\u00e0o con \u0111\u01b0\u1eddng k\u1ebft n\u1ed1i trong Internet, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn (routed) ho\u1eb7c &#8220;nh\u1ea3y&#8221; qua c\u00e1c node trung gian kh\u00e1c. N\u00f3i chung th\u00ec, c\u00e0ng c\u00f3 nhi\u1ec1u node k\u1ebft n\u1ed1i c\u1ea7n ph\u1ea3i \u0111i qua th\u00ec t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n d\u1eef li\u1ec7u c\u00e0ng ch\u1eadm. M\u1ed9t node c\u0169ng c\u00f3 th\u1ec3 ph\u1ea3i tr\u1ea3i qua t\u1eafc ngh\u1ebdn m\u1ea1ng t\u1eeb l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u1eeb (c\u00e1c) m\u1ea1ng kh\u00e1c, c\u00e1i s\u1ebd l\u00e0m ch\u1eadm \u0111i k\u1ebft n\u1ed1i v\u00e0 gia t\u0103ng RTT.<\/li>\n\n\n\n<li><strong>Kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd<\/strong>: m\u1eb7c d\u00f9 k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a th\u00f4ng qua CDN th\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng gi\u00fap gi\u1ea3m c\u00e1c b\u01b0\u1edbc nh\u1ea3y c\u1ea7n ph\u1ea3i c\u00f3 \u0111\u1ec3 \u0111\u1ebfn \u0111\u01b0\u1ee3c \u0111i\u1ec3m \u0111\u00edch, tuy nhi\u00ean th\u00ec ch\u00fang ta kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o v\u01b0\u1ee3t qua \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 \u00e1nh s\u00e1ng; kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd gi\u1eefa \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac l\u00e0 y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n trong m\u1ea1ng k\u1ebft n\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m xu\u1ed1ng b\u1eb1ng c\u00e1ch chuy\u1ec3n n\u1ed9i dung \u0111\u1ebfn v\u1ecb tr\u00ed g\u1ea7n y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng h\u01a1n. \u0110\u1ec3 v\u01b0\u1ee3t qua tr\u1edf ng\u1ea1i n\u00e0y, <a href=\"https:\/\/kiencang.net\/cdn-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">CDN s\u1ebd cache n\u1ed9i dung g\u1ea7n y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/a>, nh\u1edd v\u1eady gi\u1ea3m \u0111\u01b0\u1ee3c RTT.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lam-th\u1ebf-nao-cdn-c\u1ea3i-thi\u1ec7n-rtt\"><span class=\"ez-toc-section\" id=\"Lam_the_nao_CDN_cai_thien_RTT\"><\/span>L\u00e0m th\u1ebf n\u00e0o CDN c\u1ea3i thi\u1ec7n RTT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>B\u1eb1ng c\u00e1ch v\u1eadn h\u00e0nh &amp; duy tr\u00ec c\u00e1c m\u00e1y ch\u1ee7 b\u00ean trong c\u00e1c <a href=\"https:\/\/kiencang.net\/diem-trao-doi-internet\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u0111i\u1ec3m trao \u0111\u1ed5i Internet (internet exchage points)<\/a> c\u0169ng nh\u01b0 c\u00f3 c\u00e1c m\u1ed1i quan h\u1ec7 th\u00e2n thi\u1ebft v\u1edbi c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng kh\u00e1c, CDN c\u00f3 kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u h\u00f3a tuy\u1ebfn \u0111\u01b0\u1eddng trao \u0111\u1ed5i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau. <\/p>\n\n\n\n<p>H\u1ec7 qu\u1ea3 l\u00e0 gi\u1ea3m \u0111\u01b0\u1ee3c RTT v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tr\u1ec5 cho kh\u00e1ch gh\u00e9 th\u0103m n\u1ed9i dung \u0111\u00e3 \u0111\u01b0\u1ee3c cache tr\u00ean CDN.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tr\u1ea3i-nghi\u1ec7m-th\u1ef1c-t\u1ebf\"><span class=\"ez-toc-section\" id=\"Trai_nghiem_thuc_te\"><\/span>Tr\u1ea3i nghi\u1ec7m th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Trong ph\u1ea7n b\u1ed5 sung c\u1ee7a ng\u01b0\u1eddi d\u1ecbch n\u00e0y t\u00f4i s\u1ebd test Round-trip time tr\u00ean m\u1ed9t s\u1ed1 hosting, CDN c\u1ea3 trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc.<\/p>\n\n\n\n<p>L\u01b0u \u00fd: RTT n\u00e0y \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u00e0o gi\u1eefa th\u00e1ng m\u1ed9t n\u0103m 2021, th\u1eddi \u0111i\u1ec3m c\u00e1p quang qu\u1ed1c t\u1ebf b\u1ecb \u0111\u1ee9t kh\u00f4ng qu\u00e1 nghi\u00eam tr\u1ecdng (v\u00ec c\u00f3 c\u00e1c tuy\u1ebfn d\u1ef1 ph\u00f2ng n\u00ean \u1ea3nh h\u01b0\u1edfng \u0111\u01b0\u1eddng truy\u1ec1n qu\u1ed1c t\u1ebf \u00edt h\u01a1n).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"342\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-1.png\" alt=\"Round-trip time c\u1ee7a BunnyCDN (qu\u1ed1c t\u1ebf)\" class=\"wp-image-18055\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-1.png 677w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-1-300x152.png 300w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><figcaption class=\"wp-element-caption\">RTT c\u1ee7a <a href=\"https:\/\/kiencang.net\/gioi-thieu-bunnycdn\/\" target=\"_blank\" rel=\"noreferrer noopener\">BunnyCDN (qu\u1ed1c t\u1ebf)<\/a><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"342\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-2.png\" alt=\"Round-trip time c\u1ee7a BizFly\" class=\"wp-image-18056\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-2.png 677w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-2-300x152.png 300w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><figcaption class=\"wp-element-caption\">RTT c\u1ee7a<a href=\"https:\/\/kiencang.net\/category\/bizfly-cdn\/\" target=\"_blank\" rel=\"noreferrer noopener\"> BizFly CDN (Vi\u1ec7t Nam)<\/a><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"342\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/hosting-1.png\" alt=\"Round-trip time c\u1ee7a hosting Azdigi\" class=\"wp-image-18057\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/hosting-1.png 677w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/hosting-1-300x152.png 300w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><figcaption class=\"wp-element-caption\">RTT c\u1ee7a hosting Azdigi<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-3.png\" alt=\"Round-trip time c\u1ee7a QUIC cloud\" class=\"wp-image-18058\"\/><figcaption class=\"wp-element-caption\">RTT c\u1ee7a <a href=\"https:\/\/kiencang.net\/category\/quic-cloud\/\" target=\"_blank\" rel=\"noreferrer noopener\">QUIC cloud<\/a><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"342\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-4.png\" alt=\"Round-trip time c\u1ee7a Cloudflare\" class=\"wp-image-18059\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-4.png 677w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/cdn-4-300x152.png 300w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><figcaption class=\"wp-element-caption\">RTT c\u1ee7a <a href=\"https:\/\/kiencang.net\/category\/cloudflare\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cloudflare<\/a><\/figcaption><\/figure>\n\n\n\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n ki\u1ec3m tra nhi\u1ec1u packet g\u1eedi \u0111i li\u00ean t\u1ee5c th\u00ec sau t\u00ean mi\u1ec1n g\u00f5 th\u00eam -t, v\u00ed d\u1ee5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ping speed.family -t <\/code><\/pre>\n\n\n\n<p>N\u00f3 s\u1ebd g\u1eedi v\u00e0 nh\u1eadn cho \u0111\u1ebfn khi n\u00e0o b\u1ea1n nh\u1ea5n ph\u00edm Ctrc + C;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"677\" height=\"342\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/RTT-speed-famly-t.png\" alt=\"RTT s\u1eed d\u1ee5ng l\u1ec7nh ping -t\" class=\"wp-image-18093\" srcset=\"https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/RTT-speed-famly-t.png 677w, https:\/\/kiencang.net\/wp-content\/uploads\/2021\/01\/RTT-speed-famly-t-300x152.png 300w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><\/figure><\/div>\n\n\n<p>Xin ch\u00e0o &amp; h\u1eb9n g\u1eb7p l\u1ea1i c\u00e1c b\u1ea1n trong b\u00e0i vi\u1ebft kh\u00e1c.<\/p>\n\n\n\n<p><em>(D\u1ecbch t\u1eeb b\u00e0i vi\u1ebft <a href=\"https:\/\/www.cloudflare.com\/learning\/cdn\/glossary\/round-trip-time-rtt\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">What is round-trip time?<\/a> c\u1ee7a Cloudflare)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Round-trip time (RTT) \u0111o kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y (ms) m\u00e0 h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ea7n ph\u1ea3i b\u1ecf ra \u0111\u1ec3 m\u1ed9t y\u00eau c\u1ea7u m\u1ea1ng \u0111i t\u1eeb \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac r\u1ed3i quay tr\u1edf l\u1ea1i \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u (kh\u1ee9 h\u1ed3i, nh\u01b0 ki\u1ec3u v\u00e9 2 chi\u1ec1u \u0111\u00f3 c\u00e1c b\u1ea1n). RTT l\u00e0 m\u1ed9t ch\u1ec9 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":21375,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[252],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/round-trip-time\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Round-trip time (RTT) \u0111o kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y (ms) m\u00e0 h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ea7n ph\u1ea3i b\u1ecf ra \u0111\u1ec3 m\u1ed9t y\u00eau c\u1ea7u m\u1ea1ng \u0111i t\u1eeb \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac r\u1ed3i quay tr\u1edf l\u1ea1i \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u (kh\u1ee9 h\u1ed3i, nh\u01b0 ki\u1ec3u v\u00e9 2 chi\u1ec1u \u0111\u00f3 c\u00e1c b\u1ea1n). RTT l\u00e0 m\u1ed9t ch\u1ec9 &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kiencang.net\/round-trip-time\/\" \/>\n<meta property=\"og:site_name\" content=\"Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/anhducnguyen87\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-02-14T13:40:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-23T12:52:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kiencang.net\/wp-content\/uploads\/2022\/02\/round-trip-time.png\" \/>\n\t<meta property=\"og:image:width\" content=\"640\" \/>\n\t<meta property=\"og:image:height\" content=\"640\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT &#8226; Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/round-trip-time\/","og_locale":"vi_VN","og_type":"article","og_title":"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT &#8226; Ki\u1ebfn c\u00e0ng","og_description":"Round-trip time (RTT) \u0111o kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y (ms) m\u00e0 h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ea7n ph\u1ea3i b\u1ecf ra \u0111\u1ec3 m\u1ed9t y\u00eau c\u1ea7u m\u1ea1ng \u0111i t\u1eeb \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac r\u1ed3i quay tr\u1edf l\u1ea1i \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u (kh\u1ee9 h\u1ed3i, nh\u01b0 ki\u1ec3u v\u00e9 2 chi\u1ec1u \u0111\u00f3 c\u00e1c b\u1ea1n). RTT l\u00e0 m\u1ed9t ch\u1ec9 &hellip;","og_url":"https:\/\/kiencang.net\/round-trip-time\/","og_site_name":"Ki\u1ebfn c\u00e0ng","article_author":"https:\/\/www.facebook.com\/anhducnguyen87\/","article_published_time":"2022-02-14T13:40:00+00:00","article_modified_time":"2023-07-23T12:52:11+00:00","og_image":[{"width":640,"height":640,"url":"https:\/\/kiencang.net\/wp-content\/uploads\/2022\/02\/round-trip-time.png","type":"image\/png"}],"author":"Nguy\u1ec5n \u0110\u1ee9c Anh","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Nguy\u1ec5n \u0110\u1ee9c Anh","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"8 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/kiencang.net\/round-trip-time\/","url":"https:\/\/kiencang.net\/round-trip-time\/","name":"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT &#8226; Ki\u1ebfn c\u00e0ng","isPartOf":{"@id":"https:\/\/kiencang.net\/#website"},"datePublished":"2022-02-14T13:40:00+00:00","dateModified":"2023-07-23T12:52:11+00:00","author":{"@id":"https:\/\/kiencang.net\/#\/schema\/person\/5e7e1a04d8d1218ad8c421ba43d25c16"},"breadcrumb":{"@id":"https:\/\/kiencang.net\/round-trip-time\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/kiencang.net\/round-trip-time\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/kiencang.net\/round-trip-time\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/kiencang.net\/"},{"@type":"ListItem","position":2,"name":"Round-trip time l\u00e0 g\u00ec? V\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 \u0111\u01b0\u1ee3c l\u00e0 c\u00f3 n\u00ean d\u00f9ng hosting n\u00e0o \u0111\u00f3 hay l\u00e0 kh\u00f4ng nh\u1edd RTT"}]},{"@type":"WebSite","@id":"https:\/\/kiencang.net\/#website","url":"https:\/\/kiencang.net\/","name":"Ki\u1ebfn c\u00e0ng","description":"\u00d4m l\u00fd thuy\u1ebft, h\u00f4n th\u1ef1c h\u00e0nh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/kiencang.net\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"vi"},{"@type":"Person","@id":"https:\/\/kiencang.net\/#\/schema\/person\/5e7e1a04d8d1218ad8c421ba43d25c16","name":"Nguy\u1ec5n \u0110\u1ee9c Anh","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/kiencang.net\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6d71f9b89393952a8382e30dad26c1ec?s=96&d=monsterid&r=g","caption":"Nguy\u1ec5n \u0110\u1ee9c Anh"},"description":"Sinh n\u0103m 1987, t\u1ed1t nghi\u1ec7p Cao \u0111\u1eb3ng th\u1ef1c h\u00e0nh FPT qu\u00e3ng 2014, chuy\u00ean ng\u00e0nh Thi\u1ebft k\u1ebf website. T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. Email li\u00ean h\u1ec7: guiemailchotoi@gmail.com","sameAs":["https:\/\/www.facebook.com\/anhducnguyen87\/"],"url":"https:\/\/kiencang.net\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/18043"}],"collection":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/comments?post=18043"}],"version-history":[{"count":1,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/18043\/revisions"}],"predecessor-version":[{"id":24339,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/18043\/revisions\/24339"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media\/21375"}],"wp:attachment":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media?parent=18043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/categories?post=18043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/tags?post=18043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}