{"id":36786,"date":"2025-12-16T16:00:04","date_gmt":"2025-12-16T09:00:04","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=36786"},"modified":"2026-01-29T13:29:03","modified_gmt":"2026-01-29T06:29:03","slug":"round-trip-time-rtt-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/","title":{"rendered":"Round Trip Time (RTT) l\u00e0 g\u00ec? Ph\u00e2n bi\u1ec7t v\u1edbi Ping &#038; 5 C\u00e1ch gi\u1ea3m RTT"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/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\"><span class=\"ez-toc-js-icon-con\"><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><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Round-Trip-Time-la-gi\" >Round Trip Time 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-2\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Cach-hoat-dong-cua-RTT-trong-mang-may-tinh\" >C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a RTT trong m\u1ea1ng m\u00e1y t\u00ednh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#5-Yeu-to-chinh-anh-huong-den-chi-so-RTT\" >5 Y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ec9 s\u1ed1 RTT<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#1-Khoang-cach-dia-ly-Distance\" >1. Kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd (Distance)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#2-Moi-truong-truyen-dan-Transmission-Medium\" >2. M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn (Transmission Medium)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#3-So-luong-nut-mang-Network-Hops\" >3. S\u1ed1 l\u01b0\u1ee3ng n\u00fat m\u1ea1ng (Network Hops)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#4-Luu-luong-mang-Traffic-va-su-tac-nghen\" >4. L\u01b0u l\u01b0\u1ee3ng m\u1ea1ng (Traffic) v\u00e0 s\u1ef1 t\u1eafc ngh\u1ebdn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#5-Thoi-gian-phan-hoi-cua-may-chu-Server-Response-Time\" >5. Th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a m\u00e1y ch\u1ee7 (Server Response Time)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Phan-biet-thoi-gian-RTT-Ping-va-Network-Latency-Do-tre\" >Ph\u00e2n bi\u1ec7t th\u1eddi gian RTT, Ping v\u00e0 Network Latency (\u0110\u1ed9 tr\u1ec5)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#RTT-dung-de-lam-gi-Y-nghia-cua-RTT-trong-thuc-te\" >RTT d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec? \u00dd ngh\u0129a c\u1ee7a RTT trong th\u1ef1c t\u1ebf<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Danh-gia-chat-luong-mang-Network-Diagnostics\" >\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng m\u1ea1ng (Network Diagnostics)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Toi-uu-trai-nghiem-nguoi-dung-UX-tren-Website\" >T\u1ed1i \u01b0u tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX) tr\u00ean Website<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Quyet-dinh-hieu-nang-cua-Ung-dung-Real-time\" >Quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng c\u1ee7a \u1ee8ng d\u1ee5ng Real-time<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Nguyen-nhan-gay-RTT-cao\" >Nguy\u00ean nh\u00e2n g\u00e2y RTT cao<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Tu-phia-Client-Nguoi-dung\" >T\u1eeb ph\u00eda Client (Ng\u01b0\u1eddi d\u00f9ng)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Tu-phia-Network-Mang-luoi\" >T\u1eeb ph\u00eda Network (M\u1ea1ng l\u01b0\u1edbi)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Tu-phia-Server-May-chu\" >T\u1eeb ph\u00eda Server (M\u00e1y ch\u1ee7)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Truong-hop-nen-quan-tam-den-thoi-gian-RTT\" >Tr\u01b0\u1eddng h\u1ee3p n\u00ean quan t\u00e2m \u0111\u1ebfn th\u1eddi gian RTT<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#1-Doanh-nghiep-kinh-doanh-thuong-mai-dien-tu\" >1. Doanh nghi\u1ec7p kinh doanh th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#2-Cac-nha-phat-trien-ung-dung-SaaS\" >2. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng (SaaS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#3-He-thong-IoT-Internet-of-Things\" >3. H\u1ec7 th\u1ed1ng IoT (Internet of Things)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#RTT-bao-nhieu-la-an-toan-RTT-bao-nhieu-la-tot\" >RTT bao nhi\u00eau l\u00e0 an to\u00e0n? RTT bao nhi\u00eau l\u00e0 t\u1ed1t?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Cach-do-RTT-chinh-xac\" >C\u00e1ch \u0111o RTT ch\u00ednh x\u00e1c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Do-RTT-bang-lenh-Ping\" >\u0110o RTT b\u1eb1ng l\u1ec7nh Ping<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Theo-doi-RTT-bang-Traceroute\" >Theo d\u00f5i RTT b\u1eb1ng Traceroute<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Phan-tich-RTT-bang-cong-cu-hieu-suat-mang\" >Ph\u00e2n t\u00edch RTT b\u1eb1ng c\u00f4ng c\u1ee5 hi\u1ec7u su\u1ea5t m\u1ea1ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Cach-CDN-giup-giam-thoi-gian-RTT\" >C\u00e1ch CDN gi\u00fap gi\u1ea3m th\u1eddi gian RTT<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Points-of-Presence-PoP-%E2%80%93-Rut-ngan-khoang-cach-truyen-du-lieu\" >Points of Presence (PoP) \u2013 R\u00fat ng\u1eafn kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eef li\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Web-Caching-%E2%80%93-Xu-ly-yeu-cau-ngay-tai-vi-tri-gan-nguoi-dung\" >Web Caching \u2013 X\u1eed l\u00fd y\u00eau c\u1ea7u ngay t\u1ea1i v\u1ecb tr\u00ed g\u1ea7n ng\u01b0\u1eddi d\u00f9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Phan-phoi-tai-%E2%80%93-Giam-tac-nghen-khi-luu-luong-tang-cao\" >Ph\u00e2n ph\u1ed1i t\u1ea3i \u2013 Gi\u1ea3m t\u1eafc ngh\u1ebdn khi l\u01b0u l\u01b0\u1ee3ng t\u0103ng cao<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Kha-nang-mo-rong-%E2%80%93-Han-che-nghen-co-chai-phia-server\" >Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng \u2013 H\u1ea1n ch\u1ebf ngh\u1ebdn c\u1ed5 chai ph\u00eda server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/#Quyen-truy-cap-Tier-1-%E2%80%93-Giam-so-buoc-nhay-tren-Internet-Backbone\" >Quy\u1ec1n truy c\u1eadp Tier 1 \u2013 Gi\u1ea3m s\u1ed1 b\u01b0\u1edbc nh\u1ea3y tr\u00ean Internet Backbone<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Khi truy c\u1eadp m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a>, g\u1eedi m\u1ed9t g\u00f3i d\u1eef li\u1ec7u hay \u0111\u01a1n gi\u1ea3n l\u00e0 \u201cping\u201d \u0111\u1ebfn m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a>, b\u1ea1n c\u00f3 bao gi\u1edd th\u1eafc m\u1eafc d\u1eef li\u1ec7u m\u1ea5t bao l\u00e2u \u0111\u1ec3 \u0111i v\u00e0 quay tr\u1edf l\u1ea1i hay ch\u01b0a? Th\u1eddi gian \u0111\u00f3 ch\u00ednh l\u00e0 <strong>Round Trip Time (RTT)<\/strong> \u2013 m\u1ed9t ch\u1ec9 s\u1ed1 quan tr\u1ecdng ph\u1ea3n \u00e1nh \u0111\u1ed9 tr\u1ec5 c\u1ee7a k\u1ebft n\u1ed1i m\u1ea1ng. V\u1eady <a href=\"https:\/\/interdata.vn\/blog\/round-trip-time-rtt-la-gi\/\"><strong>Round Trip Time l\u00e0 g\u00ec<\/strong><\/a>, ho\u1ea1t \u0111\u1ed9ng ra sao v\u00e0 v\u00ec sao ch\u1ec9 s\u1ed1 n\u00e0y l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady trong m\u1ea1ng m\u00e1y t\u00ednh? Ph\u00e2n bi\u1ec7t s\u1ef1 gi\u1eefa RTT v\u00e0 Ping\/Network <a href=\"https:\/\/interdata.vn\/blog\/latency-la-gi\/\">Latency<\/a>. \u0110\u1ecdc b\u00e0i vi\u1ebft ngay!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Round-Trip-Time-la-gi\"><\/span>Round Trip Time l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Round Trip Time (RTT &#8211; Th\u1eddi gian tr\u1ec5 tr\u1ecdn v\u00f2ng)<\/strong> l\u00e0 kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng mili gi\u00e2y (ms) m\u00e0 m\u1ed9t g\u00f3i tin (packet) c\u1ea7n \u0111\u1ec3 di chuy\u1ec3n t\u1eeb \u0111i\u1ec3m xu\u1ea5t ph\u00e1t (m\u00e1y kh\u00e1ch &#8211; client) \u0111\u1ebfn \u0111i\u1ec3m \u0111\u00edch (m\u00e1y ch\u1ee7 &#8211; server) v\u00e0 quay tr\u1edf l\u1ea1i \u0111i\u1ec3m xu\u1ea5t ph\u00e1t sau khi nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i.<\/p>\n<p>N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n h\u01a1n, RTT \u0111o l\u01b0\u1eddng th\u1eddi gian c\u1ee7a m\u1ed9t &#8220;v\u00f2ng kh\u1ee9 h\u1ed3i&#8221;.<\/p>\n<figure id=\"attachment_36787\" aria-describedby=\"caption-attachment-36787\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36787\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Round-Trip-Time-la-gi.jpg\" alt=\"Round Trip Time l\u00e0 g\u00ec\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Round-Trip-Time-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Round-Trip-Time-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Round-Trip-Time-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36787\" class=\"wp-caption-text\">Round Trip Time l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>\u0110\u1ec3 b\u1ea1n \u0111\u1ecdc d\u1ec5 h\u00ecnh dung, h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng RTT gi\u1ed1ng nh\u01b0 vi\u1ec7c b\u1ea1n n\u00e9m m\u1ed9t qu\u1ea3 b\u00f3ng tennis v\u00e0o t\u01b0\u1eddng.<\/p>\n<ul>\n<li>Th\u1eddi \u0111i\u1ec3m qu\u1ea3 b\u00f3ng r\u1eddi tay b\u1ea1n l\u00e0 l\u00fac g\u00f3i tin \u0111\u01b0\u1ee3c g\u1eedi \u0111i.<\/li>\n<li>Th\u1eddi \u0111i\u1ec3m qu\u1ea3 b\u00f3ng ch\u1ea1m t\u01b0\u1eddng l\u00e0 l\u00fac g\u00f3i tin \u0111\u1ebfn server.<\/li>\n<li>Th\u1eddi \u0111i\u1ec3m qu\u1ea3 b\u00f3ng n\u1ea3y ng\u01b0\u1ee3c l\u1ea1i v\u00e0 ch\u1ea1m v\u00e0o tay b\u1ea1n l\u00e0 l\u00fac b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i.<br \/>\nT\u1ed5ng th\u1eddi gian t\u1eeb l\u00fac n\u00e9m \u0111\u1ebfn l\u00fac b\u1eaft l\u1ea1i b\u00f3ng ch\u00ednh l\u00e0 RTT.<\/li>\n<\/ul>\n<p>Trong giao th\u1ee9c TCP (Transmission Control Protocol), <strong>Round Trip Time <\/strong>c\u00f2n g\u1eafn li\u1ec1n v\u1edbi qu\u00e1 tr\u00ecnh b\u1eaft tay 3 b\u01b0\u1edbc (3-way handshake). Tr\u01b0\u1edbc khi d\u1eef li\u1ec7u th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i, client v\u00e0 server ph\u1ea3i trao \u0111\u1ed5i c\u00e1c g\u00f3i tin SYN v\u00e0 ACK \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i.<\/p>\n<p>Th\u1eddi gian \u0111\u1ec3 ho\u00e0n t\u1ea5t qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp n\u00e0y ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o RTT. N\u1ebfu ch\u1ec9 s\u1ed1 n\u00e0y cao, vi\u1ec7c k\u1ebft n\u1ed1i s\u1ebd ch\u1eadm tr\u1ec5 ngay t\u1eeb b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean, b\u1ea5t k\u1ec3 t\u1ed1c \u0111\u1ed9 t\u1ea3i xu\u1ed1ng (Download speed) c\u1ee7a m\u1ea1ng c\u00f3 nhanh \u0111\u1ebfn \u0111\u00e2u.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-hoat-dong-cua-RTT-trong-mang-may-tinh\"><\/span>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a RTT trong m\u1ea1ng m\u00e1y t\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Round Trip Time (RTT) th\u1ec3 hi\u1ec7n kho\u1ea3ng th\u1eddi gian d\u1eef li\u1ec7u c\u1ea7n \u0111\u1ec3 <strong>di chuy\u1ec3n \u0111\u1ebfn m\u1ed9t \u0111i\u1ec3m kh\u00e1c v\u00e0 quay tr\u1edf l\u1ea1i<\/strong>. V\u00ed d\u1ee5, khi m\u1ed9t ng\u01b0\u1eddi d\u00f9ng t\u1ea1i New York g\u1eedi y\u00eau c\u1ea7u k\u1ebft n\u1ed1i \u0111\u1ebfn m\u1ed9t server \u0111\u1eb7t \u1edf Singapore, d\u1eef li\u1ec7u s\u1ebd kh\u00f4ng \u0111i th\u1eb3ng m\u00e0 ph\u1ea3i \u0111i qua nhi\u1ec1u <a href=\"https:\/\/interdata.vn\/blog\/router-la-gi\/\">router<\/a> kh\u00e1c nhau, ph\u00e2n b\u1ed1 t\u1ea1i nhi\u1ec1u v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd.<\/p>\n<p>Sau khi y\u00eau c\u1ea7u t\u1eeb New York \u0111\u01b0\u1ee3c chuy\u1ec3n qua c\u00e1c tuy\u1ebfn m\u1ea1ng v\u00e0 \u0111\u1ebfn server \u1edf Singapore, server n\u00e0y s\u1ebd g\u1eedi ph\u1ea3n h\u1ed3i tr\u1edf l\u1ea1i cho ng\u01b0\u1eddi d\u00f9ng th\u00f4ng qua Internet. D\u1ef1a v\u00e0o qu\u00e1 tr\u00ecnh \u0111\u00f3, ch\u00fang ta c\u00f3 th\u1ec3 \u01b0\u1edbc t\u00ednh kho\u1ea3ng th\u1eddi gian c\u1ea7n thi\u1ebft cho m\u1ed9t v\u00f2ng di chuy\u1ec3n kh\u1ee9 h\u1ed3i gi\u1eefa hai \u0111\u1ecba \u0111i\u1ec3m \u2014 \u0111\u00e2y ch\u00ednh l\u00e0 RTT.<\/p>\n<p>C\u1ea7n l\u01b0u \u00fd r\u1eb1ng Round Trip Time ch\u1ec9 <strong>mang t\u00ednh \u01b0\u1edbc l\u01b0\u1ee3ng<\/strong> ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u1ea3m b\u1ea3o tuy\u1ec7t \u0111\u1ed1i. \u0110\u01b0\u1eddng truy\u1ec1n gi\u1eefa hai \u0111i\u1ec3m c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo th\u1eddi gian do nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau t\u00e1c \u0111\u1ed9ng. Ch\u1eb3ng h\u1ea1n, t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn m\u1ea1ng c\u00f3 th\u1ec3 khi\u1ebfn th\u1eddi gian truy\u1ec1n d\u1eef li\u1ec7u k\u00e9o d\u00e0i h\u01a1n so v\u1edbi b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p>D\u00f9 v\u1eady, RTT v\u1eabn l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1 quan tr\u1ecdng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh li\u1ec7u vi\u1ec7c thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i c\u00f3 kh\u1ea3 thi hay kh\u00f4ng, v\u00e0 n\u1ebfu c\u00f3 th\u00ec d\u1eef li\u1ec7u s\u1ebd m\u1ea5t kho\u1ea3ng bao l\u00e2u \u0111\u1ec3 ho\u00e0n th\u00e0nh m\u1ed9t v\u00f2ng truy\u1ec1n \u0111i \u2013 ph\u1ea3n h\u1ed3i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5-Yeu-to-chinh-anh-huong-den-chi-so-RTT\"><\/span>5 Y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ec9 s\u1ed1 RTT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi\u1ec3u \u0111\u01b0\u1ee3c kh\u00e1i ni\u1ec7m <strong>Round Trip Time<\/strong>\u00a0m\u1edbi ch\u1ec9 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u. \u0110\u1ec3 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng m\u1ea1ng cho doanh nghi\u1ec7p ho\u1eb7c c\u00e1 nh\u00e2n, ch\u00fang ta c\u1ea7n ph\u00e2n t\u00edch s\u00e2u c\u00e1c bi\u1ebfn s\u1ed1 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp l\u00ean ch\u1ec9 s\u1ed1 n\u00e0y. InterData \u0111\u00e3 t\u1ed5ng h\u1ee3p 5 y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh th\u01b0\u1eddng xuy\u00ean g\u00e2y ra t\u00ecnh tr\u1ea1ng th\u1eddi gian RTT cao.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Khoang-cach-dia-ly-Distance\"><\/span>1. Kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd (Distance)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 v\u1eadt l\u00fd kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i v\u00e0 c\u00f3 t\u00e1c \u0111\u1ed9ng l\u1edbn nh\u1ea5t. T\u00edn hi\u1ec7u m\u1ea1ng, d\u00f9 truy\u1ec1n qua c\u00e1p quang, v\u1eabn b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi t\u1ed1c \u0111\u1ed9 \u00e1nh s\u00e1ng. Kho\u1ea3ng c\u00e1ch gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 c\u00e0ng xa, th\u1eddi gian g\u00f3i tin di chuy\u1ec3n c\u00e0ng l\u00e2u.<\/p>\n<p>V\u00ed d\u1ee5: M\u1ed9t ng\u01b0\u1eddi d\u00f9ng t\u1ea1i H\u00e0 N\u1ed9i truy c\u1eadp m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i TP.HCM s\u1ebd c\u00f3 RTT th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi vi\u1ec7c truy c\u1eadp m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i New York (M\u1ef9). D\u1eef li\u1ec7u ph\u1ea3i \u0111i qua h\u00e0ng ngh\u00ecn km c\u00e1p bi\u1ec3n, d\u1eabn \u0111\u1ebfn th\u1eddi gian ph\u1ea3n h\u1ed3i t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Moi-truong-truyen-dan-Transmission-Medium\"><\/span>2. M\u00f4i tr\u01b0\u1eddng truy\u1ec1n d\u1eabn (Transmission Medium)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u01b0\u01a1ng th\u1ee9c k\u1ebft n\u1ed1i \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n<ul>\n<li><strong>C\u00e1p quang (Fiber Optic):<\/strong> Cung c\u1ea5p t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eabn nhanh nh\u1ea5t v\u00e0 \u1ed5n \u0111\u1ecbnh nh\u1ea5t hi\u1ec7n nay.<\/li>\n<li><strong>C\u00e1p \u0111\u1ed3ng (Copper):<\/strong> C\u00f3 \u0111\u1ed9 suy hao t\u00edn hi\u1ec7u cao h\u01a1n v\u00e0 t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n c\u00e1p quang.<\/li>\n<li><strong>M\u1ea1ng kh\u00f4ng d\u00e2y (Wifi\/4G\/5G):<\/strong> Th\u01b0\u1eddng c\u00f3 RTT cao h\u01a1n v\u00e0 k\u00e9m \u1ed5n \u0111\u1ecbnh h\u01a1n so v\u1edbi m\u1ea1ng d\u00e2y do ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a s\u00f3ng v\u00f4 tuy\u1ebfn, v\u1eadt c\u1ea3n v\u00e0 nhi\u1ec5u s\u00f3ng t\u1eeb c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c.<\/li>\n<\/ul>\n<figure id=\"attachment_36788\" aria-describedby=\"caption-attachment-36788\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36788\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Yeu-to-anh-huong-den-RTT.jpg\" alt=\"Y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT\" width=\"800\" height=\"400\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Yeu-to-anh-huong-den-RTT.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Yeu-to-anh-huong-den-RTT-300x150.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Yeu-to-anh-huong-den-RTT-768x384.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36788\" class=\"wp-caption-text\">Y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn RTT<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"3-So-luong-nut-mang-Network-Hops\"><\/span>3. S\u1ed1 l\u01b0\u1ee3ng n\u00fat m\u1ea1ng (Network Hops)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u00ean h\u00e0nh tr\u00ecnh t\u1eeb m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n \u0111\u1ebfn server, g\u00f3i tin kh\u00f4ng \u0111i m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng. D\u1eef li\u1ec7u ph\u1ea3i &#8220;nh\u1ea3y&#8221; (hop) qua nhi\u1ec1u thi\u1ebft b\u1ecb trung gian nh\u01b0 Router, <a href=\"https:\/\/interdata.vn\/blog\/switch-la-gi\/\">Switch<\/a> v\u00e0 c\u00e1c tr\u1ea1m trung chuy\u1ec3n ISP.<\/p>\n<p>T\u1ea1i m\u1ed7i \u0111i\u1ec3m n\u00fat n\u00e0y, g\u00f3i tin c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd: \u0111\u1ecdc <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> \u0111\u00edch, quy\u1ebft \u0111\u1ecbnh h\u01b0\u1edbng \u0111i ti\u1ebfp theo v\u00e0 x\u1ebfp h\u00e0ng ch\u1edd n\u1ebfu m\u1ea1ng \u0111ang b\u1eadn. M\u1ed7i m\u1ed9t &#8220;hop&#8221; s\u1ebd c\u1ed9ng th\u00eam m\u1ed9t kho\u1ea3ng th\u1eddi gian tr\u1ec5 nh\u1ecf v\u00e0o t\u1ed5ng RTT. S\u1ed1 l\u01b0\u1ee3ng hops c\u00e0ng nhi\u1ec1u, RTT c\u00e0ng cao.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Luu-luong-mang-Traffic-va-su-tac-nghen\"><\/span>4. L\u01b0u l\u01b0\u1ee3ng m\u1ea1ng (Traffic) v\u00e0 s\u1ef1 t\u1eafc ngh\u1ebdn<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">B\u0103ng th\u00f4ng<\/a> m\u1ea1ng gi\u1ed1ng nh\u01b0 m\u1ed9t con \u0111\u01b0\u1eddng cao t\u1ed1c. Khi l\u01b0\u1ee3ng xe (d\u1eef li\u1ec7u) l\u01b0u th\u00f4ng qu\u00e1 l\u1edbn v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng c\u1ee7a \u0111\u01b0\u1eddng (b\u0103ng th\u00f4ng), t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn s\u1ebd x\u1ea3y ra.<\/p>\n<p>C\u00e1c g\u00f3i tin bu\u1ed9c ph\u1ea3i &#8220;x\u1ebfp h\u00e0ng&#8221; (queueing) trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a Router ch\u1edd \u0111\u1ebfn l\u01b0\u1ee3t \u0111\u01b0\u1ee3c x\u1eed l\u00fd. Th\u1eddi gian ch\u1edd \u0111\u1ee3i n\u00e0y l\u00e0m t\u0103ng \u0111\u1ed9 tr\u1ec5 t\u1ed5ng th\u1ec3. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao v\u00e0o c\u00e1c gi\u1edd cao \u0111i\u1ec3m, m\u1ea1ng th\u01b0\u1eddng ch\u1eadm h\u01a1n v\u00e0 ch\u1ec9 s\u1ed1 RTT t\u0103ng v\u1ecdt.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5-Thoi-gian-phan-hoi-cua-may-chu-Server-Response-Time\"><\/span>5. Th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a m\u00e1y ch\u1ee7 (Server Response Time)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00f4i khi, \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng ho\u00e0n to\u00e0n th\u00f4ng tho\u00e1ng nh\u01b0ng th\u1eddi gian RTT v\u1eabn cao. Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 n\u1eb1m \u1edf ch\u00ednh m\u00e1y ch\u1ee7 \u0111\u00edch.<\/p>\n<p>N\u1ebfu server \u0111ang b\u1ecb qu\u00e1 t\u1ea3i (do l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9t bi\u1ebfn ho\u1eb7c b\u1ecb <a href=\"https:\/\/interdata.vn\/blog\/ddos-la-gi\/\">t\u1ea5n c\u00f4ng DDoS<\/a>), <a href=\"https:\/\/interdata.vn\/blog\/cpu-server\/\">CPU<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ram-server\/\">RAM<\/a> ph\u1ea3i l\u00e0m vi\u1ec7c h\u1ebft c\u00f4ng su\u1ea5t. Server s\u1ebd m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 x\u1eed l\u00fd y\u00eau c\u1ea7u v\u00e0 g\u1eedi ph\u1ea3n h\u1ed3i v\u1ec1 cho client. Kho\u1ea3ng th\u1eddi gian x\u1eed l\u00fd n\u00e0y (Processing delay) \u0111\u01b0\u1ee3c c\u1ed9ng tr\u1ef1c ti\u1ebfp v\u00e0o RTT.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Phan-biet-thoi-gian-RTT-Ping-va-Network-Latency-Do-tre\"><\/span>Ph\u00e2n bi\u1ec7t th\u1eddi gian RTT, Ping v\u00e0 Network Latency (\u0110\u1ed9 tr\u1ec5)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh t\u00ecm hi\u1ec3u <strong>RTT l\u00e0 g\u00ec<\/strong>, r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng, th\u1eadm ch\u00ed c\u1ea3 nh\u1eefng nh\u00e2n vi\u00ean k\u1ef9 thu\u1eadt m\u1edbi v\u00e0o ngh\u1ec1, th\u01b0\u1eddng nh\u1ea7m l\u1eabn gi\u1eefa ba kh\u00e1i ni\u1ec7m: RTT, Ping v\u00e0 Latency. Vi\u1ec7c hi\u1ec3u sai b\u1ea3n ch\u1ea5t s\u1ebd d\u1eabn \u0111\u1ebfn ch\u1ea9n \u0111o\u00e1n sai l\u1ed7i h\u1ec7 th\u1ed1ng.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh chi ti\u1ebft \u0111\u1ec3 l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RTT, Ping v\u00e0 Network Latency (\u0110\u1ed9 tr\u1ec5):<\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, Helvetica, sans-serif; margin: 20px 0; box-shadow: 0 6px 18px rgba(12,64,244,0.15); border-radius: 12px; overflow: hidden;\">\n<thead>\n<tr style=\"background: linear-gradient(90deg, #0C40F4, #077FFA, #0497FC); color: #ffffff;\">\n<th style=\"padding: 14px 12px; text-align: left; font-size: 15px;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-size: 15px;\">Round Trip Time (RTT)<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-size: 15px;\">Network Latency (\u0110\u1ed9 tr\u1ec5)<\/th>\n<th style=\"padding: 14px 12px; text-align: left; font-size: 15px;\">Ping<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f8faff;\">\n<td style=\"padding: 12px; font-weight: 600;\">B\u1ea3n ch\u1ea5t<\/td>\n<td style=\"padding: 12px;\">Th\u1eddi gian hai chi\u1ec1u (Kh\u1ee9 h\u1ed3i).<\/td>\n<td style=\"padding: 12px;\">Th\u01b0\u1eddng \u00e1m ch\u1ec9 th\u1eddi gian m\u1ed9t chi\u1ec1u (t\u1eeb ngu\u1ed3n \u0111\u1ebfn \u0111\u00edch).<\/td>\n<td style=\"padding: 12px;\">L\u00e0 t\u00ean m\u1ed9t c\u00f4ng c\u1ee5 (Utility) d\u00f9ng \u0111\u1ec3 \u0111o RTT.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; font-weight: 600;\">Quy tr\u00ecnh<\/td>\n<td style=\"padding: 12px;\">G\u1eedi \u0111i \u2192 Server nh\u1eadn \u2192 Ph\u1ea3n h\u1ed3i v\u1ec1.<\/td>\n<td style=\"padding: 12px;\">G\u1eedi \u0111i \u2192 Server nh\u1eadn (k\u1ebft th\u00fac).<\/td>\n<td style=\"padding: 12px;\">S\u1eed d\u1ee5ng giao th\u1ee9c ICMP \u0111\u1ec3 g\u1eedi g\u00f3i tin Echo Request.<\/td>\n<\/tr>\n<tr style=\"background: #f8faff;\">\n<td style=\"padding: 12px; font-weight: 600;\">\u0110\u01a1n v\u1ecb<\/td>\n<td style=\"padding: 12px;\">Milliseconds (ms).<\/td>\n<td style=\"padding: 12px;\">Milliseconds (ms).<\/td>\n<td style=\"padding: 12px;\">Milliseconds (ms) \u2013 hi\u1ec3n th\u1ecb k\u1ebft qu\u1ea3 RTT.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px; font-weight: 600;\">\u00dd ngh\u0129a<\/td>\n<td style=\"padding: 12px;\">\u0110o l\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i th\u1ef1c t\u1ebf c\u1ee7a m\u1ed9t v\u00f2ng k\u1ebft n\u1ed1i.<\/td>\n<td style=\"padding: 12px;\">\u0110o l\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 truy\u1ec1n tin \u0111\u1ebfn \u0111\u00edch.<\/td>\n<td style=\"padding: 12px;\">C\u00f4ng c\u1ee5 ki\u1ec3m tra k\u1ebft n\u1ed1i m\u1ea1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ping l\u00e0 c\u00f4ng c\u1ee5 b\u1ea1n s\u1eed d\u1ee5ng. Con s\u1ed1 m\u00e0 l\u1ec7nh Ping hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh ch\u00ednh l\u00e0 gi\u00e1 tr\u1ecb RTT. Trong khi \u0111\u00f3, Latency l\u00e0 thu\u1eadt ng\u1eef r\u1ed9ng h\u01a1n, nh\u01b0ng trong ng\u1eef c\u1ea3nh k\u1ef9 thu\u1eadt m\u1ea1ng chuy\u00ean s\u00e2u, Latency th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 th\u1eddi gian g\u00f3i tin \u0111i m\u1ed9t chi\u1ec1u. Do \u0111\u00f3, v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft: <strong>RTT = Latency chi\u1ec1u \u0111i + Latency chi\u1ec1u v\u1ec1 + Th\u1eddi gian x\u1eed l\u00fd t\u1ea1i Server.<\/strong><\/p>\n<p>Vi\u1ec7c n\u1eafm r\u00f5 s\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y gi\u00fap c\u00e1c k\u1ef9 s\u01b0 t\u1ea1i InterData x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf \u0111\u01b0\u1eddng truy\u1ec1n chi\u1ec1u \u0111i, chi\u1ec1u v\u1ec1 hay do m\u00e1y ch\u1ee7 x\u1eed l\u00fd ch\u1eadm.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"RTT-dung-de-lam-gi-Y-nghia-cua-RTT-trong-thuc-te\"><\/span>RTT d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec? \u00dd ngh\u0129a c\u1ee7a RTT trong th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kh\u00f4ng ph\u1ea3i ng\u1eabu nhi\u00ean m\u00e0 ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c quan t\u00e2m h\u00e0ng \u0111\u1ea7u. Vi\u1ec7c hi\u1ec3u <strong>Round Trip Time (RTT)<\/strong>\u00a0mang l\u1ea1i gi\u00e1 tr\u1ecb \u1ee9ng d\u1ee5ng to l\u1edbn trong vi\u1ec7c v\u1eadn h\u00e0nh v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng s\u1ed1.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Danh-gia-chat-luong-mang-Network-Diagnostics\"><\/span>\u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng m\u1ea1ng (Network Diagnostics)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>RTT l\u00e0 &#8220;nh\u1ecbp tim&#8221; c\u1ee7a h\u1ec7 th\u1ed1ng m\u1ea1ng. C\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n s\u1ee9c kh\u1ecfe c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n. M\u1ed9t k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh s\u1ebd c\u00f3 ch\u1ec9 s\u1ed1 RTT th\u1ea5p v\u00e0 \u00edt bi\u1ebfn \u0111\u1ed9ng (jitter th\u1ea5p). N\u1ebfu RTT tr\u1ed3i s\u1ee5t th\u1ea5t th\u01b0\u1eddng, \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a vi\u1ec7c m\u1ea5t g\u00f3i tin (packet loss) ho\u1eb7c h\u1ea1 t\u1ea7ng m\u1ea1ng \u0111ang g\u1eb7p s\u1ef1 c\u1ed1 v\u1eadt l\u00fd.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Toi-uu-trai-nghiem-nguoi-dung-UX-tren-Website\"><\/span>T\u1ed1i \u01b0u tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng (UX) tr\u00ean Website<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Google \u0111\u00e3 \u0111\u01b0a c\u00e1c ch\u1ec9 s\u1ed1 v\u1ec1 t\u1ed1c \u0111\u1ed9 v\u00e0o <a href=\"https:\/\/interdata.vn\/blog\/nhan-cpu-la-gi\/\">Core<\/a> Web Vitals \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 x\u1ebfp h\u1ea1ng <a href=\"https:\/\/interdata.vn\/blog\/seo-la-gi\/\">SEO<\/a>. RTT \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn th\u1eddi gian t\u1ea3i trang (<a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">Page<\/a> Load Time).<\/p>\n<ul>\n<li><strong>RTT cao:<\/strong> Tr\u00ecnh duy\u1ec7t m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u <a href=\"https:\/\/interdata.vn\/blog\/html-la-gi\/\">HTML<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/css-la-gi\/\">CSS<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/javascript-la-gi\/\">JavaScript<\/a> ban \u0111\u1ea7u. Ng\u01b0\u1eddi d\u00f9ng s\u1ebd th\u1ea5y m\u00e0n h\u00ecnh tr\u1eafng l\u00e2u h\u01a1n, d\u1eabn \u0111\u1ebfn t\u1ef7 l\u1ec7 tho\u00e1t trang (Bounce rate) t\u0103ng cao.<\/li>\n<li><strong>RTT th\u1ea5p:<\/strong> Website ph\u1ea3n h\u1ed3i t\u1ee9c th\u00ec, t\u1ea1o c\u1ea3m gi\u00e1c m\u01b0\u1ee3t m\u00e0, chuy\u00ean nghi\u1ec7p, gi\u1eef ch\u00e2n kh\u00e1ch h\u00e0ng \u1edf l\u1ea1i l\u00e2u h\u01a1n.<\/li>\n<\/ul>\n<figure id=\"attachment_36789\" aria-describedby=\"caption-attachment-36789\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36789\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-dung-de-lam-gi.jpg\" alt=\"RTT d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-dung-de-lam-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-dung-de-lam-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-dung-de-lam-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36789\" class=\"wp-caption-text\">RTT d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Quyet-dinh-hieu-nang-cua-Ung-dung-Real-time\"><\/span>Quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng c\u1ee7a \u1ee8ng d\u1ee5ng Real-time<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u th\u1eddi gian th\u1ef1c nh\u01b0 h\u1ed9i ngh\u1ecb truy\u1ec1n h\u00ecnh (Zoom, Google Meet), g\u1ecdi tho\u1ea1i <a href=\"https:\/\/interdata.vn\/blog\/voip-la-gi\/\">VoIP<\/a> hay Game Online, RTT l\u00e0 y\u1ebfu t\u1ed1 s\u1ed1ng c\u00f2n.<\/p>\n<ul>\n<li>Trong game b\u1eafn s\u00fang (FPS) ho\u1eb7c chi\u1ebfn thu\u1eadt (MOBA), RTT cao (ping cao) g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng delay h\u00e0nh \u0111\u1ed9ng, nh\u00e2n v\u1eadt di chuy\u1ec3n gi\u1eadt c\u1ee5c, khi\u1ebfn ng\u01b0\u1eddi ch\u01a1i thua cu\u1ed9c.<\/li>\n<li>Trong c\u00e1c cu\u1ed9c g\u1ecdi video, RTT cao g\u00e2y ra \u0111\u1ed9 tr\u1ec5 ti\u1ebfng, h\u00ecnh \u1ea3nh b\u1ecb v\u1ee1 ho\u1eb7c m\u1ea5t k\u1ebft n\u1ed1i, \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Nguyen-nhan-gay-RTT-cao\"><\/span>Nguy\u00ean nh\u00e2n g\u00e2y RTT cao<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1, ch\u00fang ta ph\u1ea3i t\u00ecm ra g\u1ed1c r\u1ec5. B\u00ean c\u1ea1nh c\u00e1c y\u1ebfu t\u1ed1 v\u1eadt l\u00fd nh\u01b0 kho\u1ea3ng c\u00e1ch, c\u00f3 nh\u1eefng nguy\u00ean nh\u00e2n k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3 khi\u1ebfn RTT t\u0103ng \u0111\u1ed9t bi\u1ebfn m\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u1ea7n l\u01b0u \u00fd khi t\u00ecm hi\u1ec3u <strong>Round Trip Time<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tu-phia-Client-Nguoi-dung\"><\/span>T\u1eeb ph\u00eda Client (Ng\u01b0\u1eddi d\u00f9ng)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng l\u1ed7i th\u1eddi:<\/strong> Modem\/Router wifi c\u0169, kh\u00f4ng h\u1ed7 tr\u1ee3 c\u00e1c chu\u1ea9n t\u1ed1c \u0111\u1ed9 cao, kh\u1ea3 n\u0103ng x\u1eed l\u00fd g\u00f3i tin k\u00e9m.<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng ch\u1ea1y ng\u1ea7m:<\/strong> M\u00e1y t\u00ednh \u0111ang ch\u1ea1y c\u00e1c ph\u1ea7n m\u1ec1m update Windows, t\u1ea3i file torrent ho\u1eb7c c\u00f3 m\u00e3 \u0111\u1ed9c \u0111ang \u00e2m th\u1ea7m g\u1eedi d\u1eef li\u1ec7u ra ngo\u00e0i, chi\u1ebfm d\u1ee5ng b\u0103ng th\u00f4ng.<\/li>\n<li><strong>S\u00f3ng Wifi y\u1ebfu:<\/strong> V\u1ecb tr\u00ed ng\u1ed3i qu\u00e1 xa Router, b\u1ecb ch\u1eafn b\u1edfi nhi\u1ec1u t\u01b0\u1eddng b\u00ea t\u00f4ng ho\u1eb7c b\u1ecb nhi\u1ec5u s\u00f3ng t\u1eeb c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Tu-phia-Network-Mang-luoi\"><\/span>T\u1eeb ph\u00eda Network (M\u1ea1ng l\u01b0\u1edbi)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>\u0110\u1ecbnh tuy\u1ebfn (Routing) k\u00e9m t\u1ed1i \u01b0u:<\/strong> ISP (Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng) \u0111\u1ecbnh tuy\u1ebfn \u0111\u01b0\u1eddng \u0111i c\u1ee7a g\u00f3i tin qua qu\u00e1 nhi\u1ec1u tr\u1ea1m trung chuy\u1ec3n kh\u00f4ng c\u1ea7n thi\u1ebft ho\u1eb7c \u0111i \u0111\u01b0\u1eddng v\u00f2ng thay v\u00ec \u0111\u01b0\u1eddng th\u1eb3ng.<\/li>\n<li><strong>S\u1ef1 c\u1ed1 c\u00e1p quang bi\u1ec3n:<\/strong> Khi c\u00e1c tuy\u1ebfn c\u00e1p quang bi\u1ec3n g\u1eb7p s\u1ef1 c\u1ed1 (\u0111\u1ee9t c\u00e1p, b\u1ea3o tr\u00ec), l\u01b0u l\u01b0\u1ee3ng ph\u1ea3i chuy\u1ec3n h\u01b0\u1edbng sang c\u00e1c tuy\u1ebfn d\u1ef1 ph\u00f2ng nh\u1ecf h\u01a1n, g\u00e2y t\u1eafc ngh\u1ebdn c\u1ee5c b\u1ed9 v\u00e0 t\u0103ng RTT.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Tu-phia-Server-May-chu\"><\/span>T\u1eeb ph\u00eda Server (M\u00e1y ch\u1ee7)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>C\u1ea5u h\u00ecnh Server ch\u01b0a t\u1ed1i \u01b0u:<\/strong> <a href=\"https:\/\/interdata.vn\/blog\/web-server\/\">Web server<\/a> (Apache\/Nginx\/LiteSpeed) c\u1ea5u h\u00ecnh kh\u00f4ng t\u1ed1t, kh\u00f4ng s\u1eed d\u1ee5ng b\u1ed9 nh\u1edb \u0111\u1ec7m (Cache).<\/li>\n<li><strong>C\u01a1 s\u1edf d\u1eef li\u1ec7u (Database) ch\u1eadm:<\/strong> C\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/query-la-gi\/\">truy v\u1ea5n<\/a> database ph\u1ee9c t\u1ea1p, kh\u00f4ng \u0111\u01b0\u1ee3c index k\u1ef9 l\u01b0\u1ee1ng khi\u1ebfn server m\u1ea5t nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u tr\u1ea3 v\u1ec1 cho client.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Truong-hop-nen-quan-tam-den-thoi-gian-RTT\"><\/span>Tr\u01b0\u1eddng h\u1ee3p n\u00ean quan t\u00e2m \u0111\u1ebfn th\u1eddi gian RTT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o b\u1ea1n c\u0169ng c\u1ea7n \u00e1m \u1ea3nh v\u1edbi nh\u1eefng con s\u1ed1 mili gi\u00e2y. Tuy nhi\u00ean, c\u00f3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3 m\u00e0 vi\u1ec7c gi\u00e1m s\u00e1t v\u00e0 t\u1ed1i \u01b0u RTT l\u00e0 nhi\u1ec7m v\u1ee5 b\u1eaft bu\u1ed9c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Doanh-nghiep-kinh-doanh-thuong-mai-dien-tu\"><\/span>1. Doanh nghi\u1ec7p kinh doanh th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>V\u1edbi c\u00e1c trang E-commerce, m\u1ed7i 100ms tr\u1ec5 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m 1% doanh thu (theo nghi\u00ean c\u1ee9u c\u1ee7a Amazon). Kh\u00e1ch h\u00e0ng kh\u00f4ng \u0111\u1ee7 ki\u00ean nh\u1eabn ch\u1edd \u0111\u1ee3i gi\u1ecf h\u00e0ng load qu\u00e1 l\u00e2u. Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>Round Trip Time <\/strong>gi\u00fap doanh nghi\u1ec7p t\u1ed1i \u01b0u h\u1ea1 t\u1ea7ng \u0111\u1ec3 gi\u1eef ch\u00e2n kh\u00e1ch mua h\u00e0ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Cac-nha-phat-trien-ung-dung-SaaS\"><\/span>2. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng (SaaS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), RTT \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u1ea3m nh\u1eadn v\u1ec1 \u0111\u1ed9 &#8220;m\u01b0\u1ee3t&#8221; c\u1ee7a \u1ee9ng d\u1ee5ng. M\u1ed9t \u1ee9ng d\u1ee5ng k\u1ebf to\u00e1n hay qu\u1ea3n l\u00fd c\u00f4ng vi\u1ec7c online c\u1ea7n ph\u1ea3n h\u1ed3i thao t\u00e1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng ngay l\u1eadp t\u1ee9c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-He-thong-IoT-Internet-of-Things\"><\/span>3. H\u1ec7 th\u1ed1ng IoT (Internet of Things)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng nh\u00e0 th\u00f4ng minh hay xe t\u1ef1 l\u00e1i, \u0111\u1ed9 tr\u1ec5 th\u1ea5p l\u00e0 y\u1ebfu t\u1ed1 an to\u00e0n. L\u1ec7nh &#8220;phanh&#8221; g\u1eedi t\u1eeb trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ebfn xe t\u1ef1 l\u00e1i ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c thi v\u1edbi RTT g\u1ea7n nh\u01b0 b\u1eb1ng 0.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"RTT-bao-nhieu-la-an-toan-RTT-bao-nhieu-la-tot\"><\/span><strong>RTT bao nhi\u00eau l\u00e0 an to\u00e0n? RTT bao nhi\u00eau l\u00e0 t\u1ed1t?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t gi\u00e1 tr\u1ecb Round-Trip Time (RTT) \u0111\u01b0\u1ee3c xem l\u00e0 t\u1ed1t hay t\u1ed1i \u01b0u s\u1ebd <strong>ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i \u1ee9ng d\u1ee5ng<\/strong> v\u00e0 <strong>m\u00f4i tr\u01b0\u1eddng m\u1ea1ng<\/strong> \u0111ang s\u1eed d\u1ee5ng. Nh\u00ecn chung, <strong>RTT c\u00e0ng th\u1ea5p th\u00ec m\u1ea1ng c\u00e0ng nhanh v\u00e0 ph\u1ea3n h\u1ed3i c\u00e0ng t\u1ed1t<\/strong>.<\/p>\n<p>V\u1edbi h\u1ea7u h\u1ebft c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn th\u00f4ng th\u01b0\u1eddng, RTT <strong>d\u01b0\u1edbi 100 mili gi\u00e2y (ms)<\/strong> \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ee9c ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, m\u1ed7i tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng s\u1ebd c\u00f3 nh\u1eefng ti\u00eau chu\u1ea9n \u0111\u00e1nh gi\u00e1 kh\u00e1c nhau.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng <strong>th\u1eddi gian th\u1ef1c<\/strong> nh\u01b0 ch\u01a1i game online ho\u1eb7c h\u1ecdp video, RTT <strong>d\u01b0\u1edbi 50 ms<\/strong> l\u00e0 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 t\u01b0\u01a1ng t\u00e1c m\u01b0\u1ee3t m\u00e0. C\u00e1c cu\u1ed9c g\u1ecdi <strong>VoIP<\/strong> v\u1eabn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t khi RTT <strong>d\u01b0\u1edbi 150 ms<\/strong>, trong khi c\u00e1c d\u1ecbch v\u1ee5 <strong>streaming<\/strong> c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn RTT cao h\u01a1n, th\u01b0\u1eddng <strong>l\u00ean \u0111\u1ebfn 200 ms<\/strong>, m\u00e0 kh\u00f4ng g\u00e2y \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<figure id=\"attachment_36790\" aria-describedby=\"caption-attachment-36790\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36790\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-bao-nhieu-la-tot.jpg\" alt=\"RTT bao nhi\u00eau l\u00e0 t\u1ed1t?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-bao-nhieu-la-tot.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-bao-nhieu-la-tot-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/RTT-bao-nhieu-la-tot-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36790\" class=\"wp-caption-text\">RTT bao nhi\u00eau l\u00e0 t\u1ed1t?<\/figcaption><\/figure>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, khi Round-Trip Time <strong>v\u01b0\u1ee3t qu\u00e1 200 ms<\/strong>, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u nh\u1eadn th\u1ea5y \u0111\u1ed9 tr\u1ec5, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c t\u00e1c v\u1ee5 c\u1ea7n t\u01b0\u01a1ng t\u00e1c. N\u1ebfu RTT <strong>tr\u00ean 300 ms<\/strong>, tr\u1ea3i nghi\u1ec7m v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c s\u1ebd b\u1ecb suy gi\u1ea3m \u0111\u00e1ng k\u1ec3 v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n trong m\u1ea1ng.<\/p>\n<p>C\u1ea7n l\u01b0u \u00fd r\u1eb1ng RTT c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo nhi\u1ec1u y\u1ebfu t\u1ed1 nh\u01b0 <strong>lo\u1ea1i m\u1ea1ng<\/strong>, <strong>kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd<\/strong> v\u00e0 <strong>t\u1ea3i l\u01b0u l\u01b0\u1ee3ng t\u1ea1i th\u1eddi \u0111i\u1ec3m s\u1eed d\u1ee5ng<\/strong>. M\u1ed9t s\u1ed1 bi\u1ebfn \u0111\u1ed9ng l\u00e0 b\u00ecnh th\u01b0\u1eddng, nh\u01b0ng n\u1ebfu RTT lu\u00f4n \u1edf m\u1ee9c cao trong th\u1eddi gian d\u00e0i, \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ea7n \u0111\u01b0\u1ee3c <strong>t\u1ed1i \u01b0u ho\u1eb7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/strong>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-do-RTT-chinh-xac\"><\/span><strong>C\u00e1ch \u0111o RTT ch\u00ednh x\u00e1c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Th\u1eddi gian tr\u1ec5 tr\u1ecdn v\u00f2ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh th\u00f4ng qua nhi\u1ec1u c\u00f4ng c\u1ee5 v\u00e0 ti\u1ec7n \u00edch kh\u00e1c nhau, bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng l\u1ec7nh Ping, theo d\u00f5i l\u1ed9 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 \u0111o hi\u1ec7u su\u1ea5t m\u1ea1ng chuy\u00ean d\u1ee5ng. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do-RTT-bang-lenh-Ping\"><\/span><strong>\u0110o RTT b\u1eb1ng l\u1ec7nh Ping<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ec7nh Ping \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1eedi c\u00e1c g\u00f3i tin ICMP Echo Request \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00edch, sau \u0111\u00f3 \u0111o kho\u1ea3ng th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 nh\u1eadn l\u1ea1i Echo Reply. Kho\u1ea3ng th\u1eddi gian n\u00e0y ch\u00ednh l\u00e0 RTT gi\u1eefa thi\u1ebft b\u1ecb g\u1eedi v\u00e0 m\u00e1y ch\u1ee7 nh\u1eadn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Theo-doi-RTT-bang-Traceroute\"><\/span><strong>Theo d\u00f5i RTT b\u1eb1ng Traceroute<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Traceroute cho ph\u00e9p hi\u1ec3n th\u1ecb to\u00e0n b\u1ed9 l\u1ed9 tr\u00ecnh m\u00e0 c\u00e1c g\u00f3i d\u1eef li\u1ec7u \u0111i qua \u0111\u1ec3 \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00edch. C\u00f4ng c\u1ee5 n\u00e0y cung c\u1ea5p gi\u00e1 tr\u1ecb RTT t\u1ea1i t\u1eebng b\u01b0\u1edbc nh\u1ea3y, t\u1eeb \u0111\u00f3 gi\u00fap ph\u00e1t hi\u1ec7n v\u00e0 ch\u1ea9n \u0111o\u00e1n nh\u1eefng \u0111i\u1ec3m x\u1ea3y ra \u0111\u1ed9 tr\u1ec5 b\u1ea5t th\u01b0\u1eddng tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-tich-RTT-bang-cong-cu-hieu-suat-mang\"><\/span><strong>Ph\u00e2n t\u00edch RTT b\u1eb1ng c\u00f4ng c\u1ee5 hi\u1ec7u su\u1ea5t m\u1ea1ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c c\u00f4ng c\u1ee5 \u0111o hi\u1ec7u su\u1ea5t m\u1ea1ng chuy\u00ean s\u00e2u cung c\u1ea5p kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch RTT m\u1ed9t c\u00e1ch chi ti\u1ebft tr\u00ean to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng m\u1ea1ng. Nh\u1eefng c\u00f4ng c\u1ee5 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n gi\u00e1m s\u00e1t, gi\u00fap theo d\u00f5i RTT li\u00ean t\u1ee5c v\u00e0 cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft ph\u1ee5c v\u1ee5 vi\u1ec7c \u0111\u00e1nh gi\u00e1 hi\u1ec7u n\u0103ng m\u1ea1ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-CDN-giup-giam-thoi-gian-RTT\"><\/span>C\u00e1ch CDN gi\u00fap gi\u1ea3m th\u1eddi gian RTT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/interdata.vn\/blog\/cdn-la-gi\/\">CDN<\/a> l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng c\u00e1c server \u0111\u01b0\u1ee3c tri\u1ec3n khai c\u00f3 ch\u1ee7 \u0111\u00edch t\u1ea1i nhi\u1ec1u v\u1ecb tr\u00ed kh\u00e1c nhau, trong \u0111\u00f3 m\u1ed7i server l\u01b0u gi\u1eef b\u1ea3n sao n\u1ed9i dung c\u1ee7a website. Nh\u1edd c\u1ea5u tr\u00fac n\u00e0y, CDN c\u00f3 th\u1ec3 x\u1eed l\u00fd v\u00e0 gi\u1ea3m c\u00e1c y\u1ebfu t\u1ed1 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn Round Trip Time th\u00f4ng qua nh\u1eefng c\u01a1 ch\u1ebf sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Points-of-Presence-PoP-%E2%80%93-Rut-ngan-khoang-cach-truyen-du-lieu\"><\/span><strong>Points of Presence (PoP) \u2013 R\u00fat ng\u1eafn kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eef li\u1ec7u<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CDN duy tr\u00ec m\u1ea1ng l\u01b0\u1edbi c\u00e1c PoP \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 r\u1ed9ng kh\u1eafp v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 nh\u1eefng <a href=\"https:\/\/interdata.vn\/blog\/data-center-la-gi\/\">trung t\u00e2m d\u1eef li\u1ec7u<\/a>. M\u1ed7i PoP l\u01b0u tr\u1eef n\u1ed9i dung website trong b\u1ed9 nh\u1edb cache v\u00e0 tr\u1ef1c ti\u1ebfp ph\u1ee5c v\u1ee5 ng\u01b0\u1eddi d\u00f9ng \u1edf khu v\u1ef1c l\u00e2n c\u1eadn. C\u00e1ch l\u00e0m n\u00e0y gi\u00fap t\u00edn hi\u1ec7u kh\u00f4ng ph\u1ea3i di chuy\u1ec3n qu\u00e3ng \u0111\u01b0\u1eddng d\u00e0i, \u0111\u1ed3ng th\u1eddi gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng b\u01b0\u1edbc nh\u1ea3y m\u1ea1ng c\u1ea7n thi\u1ebft tr\u01b0\u1edbc khi \u0111\u1ebfn server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Web-Caching-%E2%80%93-Xu-ly-yeu-cau-ngay-tai-vi-tri-gan-nguoi-dung\"><\/span><strong>Web Caching \u2013 X\u1eed l\u00fd y\u00eau c\u1ea7u ngay t\u1ea1i v\u1ecb tr\u00ed g\u1ea7n ng\u01b0\u1eddi d\u00f9ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CDN l\u01b0u tr\u1eef c\u00e1c n\u1ed9i dung nh\u01b0 HTML, media v\u00e0 th\u1eadm ch\u00ed tri\u1ec3n khai PoP ngay g\u1ea7n ng\u01b0\u1eddi truy c\u1eadp. Trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng, y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft tr\u1ef1c ti\u1ebfp t\u1ea1i PoP c\u1ee5c b\u1ed9 m\u00e0 kh\u00f4ng c\u1ea7n chuy\u1ec3n ti\u1ebfp v\u1ec1 server g\u1ed1c, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 Round Trip Time.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-phoi-tai-%E2%80%93-Giam-tac-nghen-khi-luu-luong-tang-cao\"><\/span><strong>Ph\u00e2n ph\u1ed1i t\u1ea3i \u2013 Gi\u1ea3m t\u1eafc ngh\u1ebdn khi l\u01b0u l\u01b0\u1ee3ng t\u0103ng cao<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong nh\u1eefng th\u1eddi \u0111i\u1ec3m l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn, CDN s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u th\u00f4ng qua c\u00e1c server d\u1ef1 ph\u00f2ng c\u00f3 m\u1ee9c \u0111\u1ed9 t\u1eafc ngh\u1ebdn th\u1ea5p h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap r\u00fat ng\u1eafn th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a server v\u00e0 g\u00f3p ph\u1ea7n gi\u1ea3m RTT t\u1ed5ng th\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kha-nang-mo-rong-%E2%80%93-Han-che-nghen-co-chai-phia-server\"><\/span><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng \u2013 H\u1ea1n ch\u1ebf ngh\u1ebdn c\u1ed5 chai ph\u00eda server<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u1ecbch v\u1ee5 CDN v\u1eadn h\u00e0nh tr\u00ean n\u1ec1n t\u1ea3ng cloud, cho ph\u00e9p m\u1edf r\u1ed9ng linh ho\u1ea1t v\u00e0 x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng g\u1ea7n nh\u01b0 kh\u00f4ng gi\u1edbi h\u1ea1n. Nh\u1edd \u0111\u00f3, nguy c\u01a1 x\u1ea3y ra t\u1eafc ngh\u1ebdn \u1edf ph\u00eda server \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quyen-truy-cap-Tier-1-%E2%80%93-Giam-so-buoc-nhay-tren-Internet-Backbone\"><\/span><strong>Quy\u1ec1n truy c\u1eadp Tier 1 \u2013 Gi\u1ea3m s\u1ed1 b\u01b0\u1edbc nh\u1ea3y tr\u00ean Internet Backbone<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CDN th\u01b0\u1eddng c\u00f3 th\u1ecfa thu\u1eadn tr\u1ef1c ti\u1ebfp v\u1edbi c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) l\u1edbn \u0111\u1ec3 truy c\u1eadp Tier 1 v\u00e0o Internet Backbone. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u00edn hi\u1ec7u ph\u1ea3i \u0111i qua \u00edt b\u01b0\u1edbc nh\u1ea3y m\u1ea1ng h\u01a1n, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 Round Trip Time.<\/p>\n<p>Ngay t\u1eeb khi ra \u0111\u1eddi, m\u1ed9t trong nh\u1eefng b\u00e0i to\u00e1n c\u1ed1t l\u00f5i c\u1ee7a CDN l\u00e0 l\u00e0m sao \u0111\u1ec3 r\u00fat ng\u1eafn Round Trip Time. B\u1eb1ng vi\u1ec7c x\u1eed l\u00fd \u0111\u1ed3ng th\u1eddi c\u00e1c y\u1ebfu t\u1ed1 k\u1ec3 tr\u00ean, CDN \u0111\u00e3 gi\u1ea3i quy\u1ebft hi\u1ec7u qu\u1ea3 v\u1ea5n \u0111\u1ec1 n\u00e0y. Tr\u00ean th\u1ef1c t\u1ebf, vi\u1ec7c RTT gi\u1ea3m t\u1eeb 50% tr\u1edf l\u00ean sau khi s\u1eed d\u1ee5ng CDN l\u00e0 k\u1ebft qu\u1ea3 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 k\u1ef3 v\u1ecdng.<\/p>\n<p>Qua b\u00e0i vi\u1ebft n\u00e0y, <strong><a href=\"http:\/\/interdata.vn\/\">InterData<\/a> <\/strong>hy v\u1ecdng \u0111\u00e3 gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 t\u01b0\u1eddng t\u1eadn\u00a0Round Trip Time (RTT) l\u00e0 g\u00ec\u00a0c\u0169ng nh\u01b0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1. RTT kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t con s\u1ed1 k\u1ef9 thu\u1eadt kh\u00f4 khan, m\u00e0 l\u00e0 th\u01b0\u1edbc \u0111o tr\u1ef1c ti\u1ebfp cho s\u1ef1 h\u00e0i l\u00f2ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 hi\u1ec7u qu\u1ea3 kinh doanh.<\/p>\n<p>D\u00f9 b\u1ea1n l\u00e0 m\u1ed9t game th\u1ee7 mu\u1ed1n gi\u1ea3m lag, m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/lap-trinh-la-gi\/\">l\u1eadp tr\u00ecnh<\/a> vi\u00ean \u0111ang t\u1ed1i \u01b0u \u1ee9ng d\u1ee5ng, hay m\u1ed9t ch\u1ee7 doanh nghi\u1ec7p mu\u1ed1n c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 website, vi\u1ec7c ki\u1ec3m so\u00e1t v\u00e0 t\u1ed1i \u01b0u RTT l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft.<\/p>\n<p>H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c ki\u1ec3m tra ngay <a href=\"https:\/\/interdata.vn\/blog\/network-speed-la-gi\/\">t\u1ed1c \u0111\u1ed9 m\u1ea1ng<\/a> hi\u1ec7n t\u1ea1i c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ea1n \u0111ang v\u1eadn h\u00e0nh website v\u00e0 g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i ch\u1eadm, h\u00e3y c\u00e2n nh\u1eafc c\u00e1c gi\u1ea3i ph\u00e1p v\u1ec1 Server t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c CDN \u0111\u1ec3 r\u00fat ng\u1eafn kho\u1ea3ng c\u00e1ch v\u1edbi kh\u00e1ch h\u00e0ng. M\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 RTT th\u1ea5p ch\u00ednh l\u00e0 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho m\u1ecdi tr\u1ea3i nghi\u1ec7m s\u1ed1 m\u01b0\u1ee3t m\u00e0.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Khi truy c\u1eadp m\u1ed9t website, g\u1eedi m\u1ed9t g\u00f3i d\u1eef li\u1ec7u hay \u0111\u01a1n gi\u1ea3n l\u00e0 \u201cping\u201d \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7, b\u1ea1n c\u00f3 bao gi\u1edd th\u1eafc m\u1eafc d\u1eef li\u1ec7u m\u1ea5t bao l\u00e2u \u0111\u1ec3 \u0111i v\u00e0 quay tr\u1edf l\u1ea1i hay ch\u01b0a? Th\u1eddi gian \u0111\u00f3 ch\u00ednh l\u00e0 Round Trip Time (RTT) \u2013 m\u1ed9t ch\u1ec9 s\u1ed1 quan tr\u1ecdng ph\u1ea3n \u00e1nh<\/p>\n","protected":false},"author":11,"featured_media":36791,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-36786","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=36786"}],"version-history":[{"count":4,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36786\/revisions"}],"predecessor-version":[{"id":38744,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36786\/revisions\/38744"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/36791"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=36786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=36786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=36786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}