{"id":33012,"date":"2025-09-08T10:39:36","date_gmt":"2025-09-08T03:39:36","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=33012"},"modified":"2025-09-22T10:49:24","modified_gmt":"2025-09-22T03:49:24","slug":"network-layer-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/","title":{"rendered":"Network Layer l\u00e0 g\u00ec? Ch\u1ee9c n\u0103ng, Giao th\u1ee9c &#038; Thi\u1ebft b\u1ecb t\u1ea7ng 3 OSI"},"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\/network-layer-la-gi\/#Network-Layer-la-gi\" >Network Layer 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\/network-layer-la-gi\/#Vi-tri-cua-Network-Layer-trong-mo-hinh-OSI\" >V\u1ecb tr\u00ed c\u1ee7a Network Layer trong m\u00f4 h\u00ecnh OSI<\/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\/network-layer-la-gi\/#Chuc-nang-chinh-cua-tang-mang-Network-Layer\" >Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a t\u1ea7ng m\u1ea1ng Network Layer<\/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\/network-layer-la-gi\/#Dinh-tuyen-Routing\" >\u0110\u1ecbnh tuy\u1ebfn (Routing)<\/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\/network-layer-la-gi\/#Chuyen-tiep-Forwarding\" >Chuy\u1ec3n ti\u1ebfp (Forwarding)<\/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\/network-layer-la-gi\/#Dia-chi-hoa-logic-Logical-Addressing\" >\u0110\u1ecba ch\u1ec9 h\u00f3a logic (Logical Addressing)<\/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\/network-layer-la-gi\/#Phan-manh-va-ghep-lai-Fragmentation-and-Reassembly\" >Ph\u00e2n m\u1ea3nh v\u00e0 gh\u00e9p l\u1ea1i (Fragmentation and Reassembly)<\/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\/network-layer-la-gi\/#Kiem-soat-loi-va-quan-ly-mang-Error-Handling-and-Network-Management\" >Ki\u1ec3m so\u00e1t l\u1ed7i v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng (Error Handling and Network Management)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Ho-tro-mang-huong-ket-noi-hoac-khong-ket-noi\" >H\u1ed7 tr\u1ee3 m\u1ea1ng h\u01b0\u1edbng k\u1ebft n\u1ed1i ho\u1eb7c kh\u00f4ng k\u1ebft n\u1ed1i<\/a><\/li><\/ul><\/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\/network-layer-la-gi\/#Cac-giao-thuc-va-thiet-bi-quan-trong-trong-Network-Layer\" >C\u00e1c giao th\u1ee9c v\u00e0 thi\u1ebft b\u1ecb quan tr\u1ecdng trong Network Layer<\/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\/network-layer-la-gi\/#Cac-giao-thuc\" >C\u00e1c giao th\u1ee9c<\/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\/network-layer-la-gi\/#Cac-thiet-bi\" >C\u00e1c thi\u1ebft b\u1ecb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer\" >Ph\u00e2n bi\u1ec7t Network Layer v\u1edbi c\u00e1c t\u1ea7ng Data Link Layer &amp; Transport Layer<\/a><\/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\/network-layer-la-gi\/#Vi-du-thuc-te-ve-hoat-dong-cua-Network-Layer\" >V\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Network Layer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Ung-dung-thuc-te-cua-Network-Layer\" >\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Network Layer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Cach-Network-Layer-xu-ly-va-dinh-tuyen-goi-tin\" >C\u00e1ch Network Layer x\u1eed l\u00fd v\u00e0 \u0111\u1ecbnh tuy\u1ebfn g\u00f3i tin<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Xac-dinh-dia-chi-dich\" >X\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 \u0111\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Lua-chon-duong-di-toi-uu\" >L\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng \u0111i t\u1ed1i \u01b0u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Truyen-goi-tin-qua-cac-router\" >Truy\u1ec1n g\u00f3i tin qua c\u00e1c router<\/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\/network-layer-la-gi\/#Xu-ly-goi-tin-tai-noi-nhan\" >X\u1eed l\u00fd g\u00f3i tin t\u1ea1i n\u01a1i nh\u1eadn<\/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\/network-layer-la-gi\/#Dam-bao-tinh-toan-ven-du-lieu\" >\u0110\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/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\/network-layer-la-gi\/#Cac-bien-phap-bao-mat-quan-trong-trong-Network-Layer\" >C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt quan tr\u1ecdng trong Network Layer<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Su-dung-tuong-lua-Firewall\" >S\u1eed d\u1ee5ng t\u01b0\u1eddng l\u1eeda (Firewall)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Trien-khai-mang-rieng-ao-VPN\" >Tri\u1ec3n khai m\u1ea1ng ri\u00eang \u1ea3o (VPN)<\/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\/network-layer-la-gi\/#Phan-doan-mang-Network-Segmentation\" >Ph\u00e2n \u0111o\u1ea1n m\u1ea1ng (Network Segmentation)<\/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\/network-layer-la-gi\/#Kiem-soat-quyen-truy-cap-Access-Control\" >Ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp (Access Control)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Ap-dung-giao-thuc-ma-hoa\" >\u00c1p d\u1ee5ng giao th\u1ee9c m\u00e3 h\u00f3a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/#Giam-sat-va-phan-ung-su-co\" >Gi\u00e1m s\u00e1t v\u00e0 ph\u1ea3n \u1ee9ng s\u1ef1 c\u1ed1<\/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\/network-layer-la-gi\/#Cap-nhat-phan-mem-dinh-ky\" >C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m \u0111\u1ecbnh k\u1ef3<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Trong m\u1ea1ng m\u00e1y t\u00ednh, 7 t\u1ea7ng c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/mo-hinh-osi-la-gi\/\">m\u00f4 h\u00ecnh OSI<\/a> (Open Systems Interconnection) &#8211; Network Layer (t\u1ea7ng m\u1ea1ng) gi\u1eef vai tr\u00f2 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng: ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9, \u0111\u1ecbnh tuy\u1ebfn v\u00e0 \u0111\u1ea3m b\u1ea3o g\u00f3i tin \u0111i \u0111\u00fang \u0111\u00edch. V\u1eady <strong>Network Layer l\u00e0 g\u00ec<\/strong> trong OSI, ch\u1ee9c n\u0103ng v\u00e0 kh\u00e1c bi\u1ec7t th\u1ebf n\u00e0o so v\u1edbi c\u00e1c t\u1ea7ng kh\u00e1c? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t c\u1ee7a t\u1ea7ng m\u1ea1ng, c\u00e1c giao th\u1ee9c, thi\u1ebft b\u1ecb ti\u00eau bi\u1ec3u v\u00e0 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 d\u1ec5 h\u00ecnh dung h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Network-Layer-la-gi\"><\/span>Network Layer l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><a href=\"https:\/\/interdata.vn\/blog\/network-layer-la-gi\/\">Network Layer<\/a> (T\u1ea7ng m\u1ea1ng) l\u00e0 t\u1ea7ng th\u1ee9 3 trong m\u00f4 h\u00ecnh OSI (Open Systems Interconnection)<\/strong>, c\u00f3 nhi\u1ec7m v\u1ee5 ch\u00ednh l\u00e0 x\u1eed l\u00fd vi\u1ec7c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 v\u00e0 \u0111\u1ecbnh tuy\u1ebfn d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o g\u00f3i tin \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb thi\u1ebft b\u1ecb ngu\u1ed3n \u0111\u1ebfn \u0111\u00fang thi\u1ebft b\u1ecb \u0111\u00edch, ngay c\u1ea3 khi ch\u00fang n\u1eb1m \u1edf nh\u1eefng m\u1ea1ng kh\u00e1c nhau.<\/p>\n<p>N\u1ebfu <a href=\"https:\/\/interdata.vn\/blog\/physical-layer-la-gi\/\">Physical Layer<\/a> (t\u1ea7ng v\u1eadt l\u00fd) ch\u1ec9 lo vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u, <a href=\"https:\/\/interdata.vn\/blog\/data-link-layer-la-gi\/\">Data Link Layer<\/a> (t\u1ea7ng li\u00ean k\u1ebft d\u1eef li\u1ec7u) \u0111\u1ea3m b\u1ea3o truy\u1ec1n t\u1ea3i ch\u00ednh x\u00e1c trong c\u00f9ng m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9, th\u00ec Network Layer ch\u00ednh l\u00e0 \u201cng\u01b0\u1eddi \u0111i\u1ec1u ph\u1ed1i \u0111\u01b0\u1eddng \u0111i\u201d \u2013 n\u00f3 quy\u1ebft \u0111\u1ecbnh g\u00f3i tin s\u1ebd \u0111i theo tuy\u1ebfn n\u00e0o \u0111\u1ec3 \u0111\u1ebfn \u0111\u00edch nhanh nh\u1ea5t v\u00e0 t\u1ed1i \u01b0u nh\u1ea5t.<\/p>\n<figure id=\"attachment_33015\" aria-describedby=\"caption-attachment-33015\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-33015\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Network-Layer-la-gi.jpg\" alt=\"Network Layer l\u00e0 g\u00ec\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Network-Layer-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Network-Layer-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Network-Layer-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-33015\" class=\"wp-caption-text\">Network Layer l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Vi-tri-cua-Network-Layer-trong-mo-hinh-OSI\"><\/span><strong>V\u1ecb tr\u00ed c\u1ee7a Network Layer trong m\u00f4 h\u00ecnh OSI<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong m\u00f4 h\u00ecnh OSI v\u1edbi 7 t\u1ea7ng, m\u1ed7i t\u1ea7ng \u0111\u1ec1u c\u00f3 ch\u1ee9c n\u0103ng ri\u00eang bi\u1ec7t v\u00e0 ph\u1ed1i h\u1ee3p ch\u1eb7t ch\u1ebd v\u1edbi nhau. T\u1ea7ng m\u1ea1ng &#8211; <strong>Network Layer<\/strong> n\u1eb1m \u1edf t\u1ea7ng th\u1ee9 ba, k\u1eb9p gi\u1eefa hai t\u1ea7ng quan tr\u1ecdng kh\u00e1c: <strong>Data Link Layer (t\u1ea7ng 2)<\/strong> v\u00e0 <strong><a href=\"https:\/\/interdata.vn\/blog\/transport-layer-lop-van-chuyen-trong-ois-la-gi\/\">Transport Layer<\/a> (t\u1ea7ng 4)<\/strong>.<\/p>\n<ul>\n<li><strong>Ph\u00eda d\u01b0\u1edbi:<\/strong> Data Link Layer (t\u1ea7ng 2) x\u1eed l\u00fd vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u trong c\u00f9ng m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9 (LAN), s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd (MAC Address).<\/li>\n<li><strong>Ph\u00eda tr\u00ean:<\/strong> Transport Layer (t\u1ea7ng 4) ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e2n \u0111o\u1ea1n d\u1eef li\u1ec7u, ki\u1ec3m so\u00e1t lu\u1ed3ng v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady c\u1ee7a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa c\u00e1c \u1ee9ng d\u1ee5ng, s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 c\u1ed5ng (<a href=\"https:\/\/interdata.vn\/blog\/port-la-gi\/\">port<\/a>).<\/li>\n<\/ul>\n<p>V\u1ecb tr\u00ed n\u00e0y cho th\u1ea5y Network Layer l\u00e0 c\u1ea7u n\u1ed1i quan tr\u1ecdng, ti\u1ebfp nh\u1eadn d\u1eef li\u1ec7u t\u1eeb t\u1ea7ng 4, \u0111\u00f3ng g\u00f3i l\u1ea1i v\u00e0 chuy\u1ec3n xu\u1ed1ng t\u1ea7ng 2 \u0111\u1ec3 \u0111\u01b0a v\u00e0o m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd. \u0110i\u1ec1u n\u00e0y gi\u00fap h\u1ec7 th\u1ed1ng m\u1ea1ng ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch m\u1ea1ch l\u1ea1c v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Chuc-nang-chinh-cua-tang-mang-Network-Layer\"><\/span><strong>Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a t\u1ea7ng m\u1ea1ng Network Layer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Network Layer kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 &#8220;\u0111\u1ecbnh tuy\u1ebfn&#8221;, n\u00f3 c\u00f2n c\u00f3 nhi\u1ec1u ch\u1ee9c n\u0103ng ph\u1ee9c t\u1ea1p h\u01a1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i ch\u00ednh x\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dinh-tuyen-Routing\"><\/span>\u0110\u1ecbnh tuy\u1ebfn (Routing)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a t\u1ea7ng m\u1ea1ng. T\u1ea7ng n\u00e0y x\u00e1c \u0111\u1ecbnh v\u00e0 l\u1ef1a ch\u1ecdn con \u0111\u01b0\u1eddng t\u1ed1i \u01b0u nh\u1ea5t \u0111\u1ec3 d\u1eef li\u1ec7u \u0111i t\u1eeb ngu\u1ed3n \u0111\u1ebfn \u0111\u00edch qua nhi\u1ec1u m\u1ea1ng kh\u00e1c nhau, s\u1eed d\u1ee5ng c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/thuat-toan-algorithm\/\">thu\u1eadt to\u00e1n<\/a> v\u00e0 giao th\u1ee9c nh\u01b0 RIP, OSPF, BGP \u0111\u1ec3 x\u00e2y d\u1ef1ng b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn. Vi\u1ec7c n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap d\u1eef li\u1ec7u \u0111\u1ebfn \u0111\u00fang n\u01a1i m\u00e0 c\u00f2n t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t truy\u1ec1n t\u1ea3i, gi\u1ea3m thi\u1ec3u t\u1eafc ngh\u1ebdn m\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Chuyen-tiep-Forwarding\"><\/span>Chuy\u1ec3n ti\u1ebfp (Forwarding)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi d\u1eef li\u1ec7u \u0111\u1ebfn m\u1ed9t n\u00fat m\u1ea1ng (router), t\u1ea7ng m\u1ea1ng ch\u1ecbu tr\u00e1ch nhi\u1ec7m chuy\u1ec3n ti\u1ebfp g\u00f3i tin t\u1eeb c\u1ed5ng nh\u1eadn v\u00e0o \u0111\u1ebfn c\u1ed5ng chuy\u1ec3n ra d\u1ef1a tr\u00ean b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn \u0111\u00e3 x\u00e1c \u0111\u1ecbnh. Qu\u00e1 tr\u00ecnh n\u00e0y x\u1ea3y ra \u1edf m\u1ed7i b\u01b0\u1edbc tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ebfn \u0111\u00edch cu\u1ed1i c\u00f9ng.<\/p>\n<figure id=\"attachment_33016\" aria-describedby=\"caption-attachment-33016\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-33016\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Chuc-nang-chinh-cua-tang-mang-Network-Layer.jpg\" alt=\"Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a t\u1ea7ng m\u1ea1ng Network Layer\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Chuc-nang-chinh-cua-tang-mang-Network-Layer.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Chuc-nang-chinh-cua-tang-mang-Network-Layer-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Chuc-nang-chinh-cua-tang-mang-Network-Layer-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-33016\" class=\"wp-caption-text\">Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a t\u1ea7ng m\u1ea1ng Network Layer<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Dia-chi-hoa-logic-Logical-Addressing\"><\/span>\u0110\u1ecba ch\u1ec9 h\u00f3a logic (Logical Addressing)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Layer 3 s\u1eed d\u1ee5ng <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> \u0111\u1ec3 nh\u1eadn d\u1ea1ng duy nh\u1ea5t c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng tr\u00ean Internet ho\u1eb7c m\u1ea1ng n\u1ed9i b\u1ed9. \u0110\u1ecba ch\u1ec9 IP gi\u00fap ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng \u0111\u00e2u l\u00e0 ngu\u1ed3n ph\u00e1t v\u00e0 \u0111\u00e2u l\u00e0 \u0111i\u1ec3m \u0111\u1ebfn, r\u1ea5t c\u1ea7n thi\u1ebft trong m\u00f4i tr\u01b0\u1eddng \u0111a m\u1ea1ng ph\u1ee9c t\u1ea1p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-manh-va-ghep-lai-Fragmentation-and-Reassembly\"><\/span>Ph\u00e2n m\u1ea3nh v\u00e0 gh\u00e9p l\u1ea1i (Fragmentation and Reassembly)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>G\u00f3i <a href=\"https:\/\/interdata.vn\/blog\/big-data-la-gi\/\">d\u1eef li\u1ec7u l\u1edbn<\/a> khi \u0111i qua c\u00e1c m\u1ea1ng c\u00f3 gi\u1edbi h\u1ea1n k\u00edch th\u01b0\u1edbc t\u1ed1i \u0111a c\u1ee7a khung d\u1eef li\u1ec7u (MTU) c\u1ea7n \u0111\u01b0\u1ee3c chia nh\u1ecf th\u00e0nh c\u00e1c \u0111o\u1ea1n nh\u1ecf h\u01a1n \u0111\u1ec3 truy\u1ec1n t\u1ea3i. T\u1ea7ng m\u1ea1ng x\u1eed l\u00fd vi\u1ec7c ph\u00e2n m\u1ea3nh n\u00e0y v\u00e0 gh\u00e9p c\u00e1c ph\u1ea7n l\u1ea1i \u0111\u00fang th\u1ee9 t\u1ef1 khi \u0111\u1ebfn \u0111i\u1ec3m cu\u1ed1i, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n th\u00f4ng tin.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kiem-soat-loi-va-quan-ly-mang-Error-Handling-and-Network-Management\"><\/span>Ki\u1ec3m so\u00e1t l\u1ed7i v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng (Error Handling and Network Management)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea7ng n\u00e0y cung c\u1ea5p c\u01a1 ch\u1ebf th\u00f4ng b\u00e1o l\u1ed7i b\u1eb1ng c\u00e1c giao th\u1ee9c nh\u01b0 ICMP, gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i nh\u01b0 \u0111\u1ecba ch\u1ec9 kh\u00f4ng t\u1ed3n t\u1ea1i, m\u1ea1ng kh\u00f4ng kh\u1ea3 d\u1ee5ng, ho\u1eb7c TTL (<a href=\"https:\/\/interdata.vn\/blog\/ttl-la-gi\/\">Time to Live<\/a>) h\u1ebft h\u1ea1n. Ngo\u00e0i ra, n\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng v\u00e0 \u01b0u ti\u00ean d\u1ecbch v\u1ee5 (QoS) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u quan tr\u1ecdng \u0111\u01b0\u1ee3c truy\u1ec1n nhanh h\u01a1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-mang-huong-ket-noi-hoac-khong-ket-noi\"><\/span>H\u1ed7 tr\u1ee3 m\u1ea1ng h\u01b0\u1edbng k\u1ebft n\u1ed1i ho\u1eb7c kh\u00f4ng k\u1ebft n\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Layer 3 c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m vi\u1ec7c trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng linh ho\u1ea1t, d\u00f9 l\u00e0 m\u1ea1ng d\u1ef1a tr\u00ean k\u1ebft n\u1ed1i (v\u00ed d\u1ee5 nh\u01b0 m\u1ea1ng chuy\u1ec3n m\u1ea1ch m\u1ea1ch \u1ea3o) hay m\u1ea1ng kh\u00f4ng k\u1ebft n\u1ed1i nh\u01b0 IP.<\/p>\n<p>Nh\u01b0 v\u1eady, Network Layer kh\u00f4ng ch\u1ec9 l\u00e0 t\u1ea7ng quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1eddng \u0111i d\u1eef li\u1ec7u m\u00e0 c\u00f2n l\u00e0 \u0111i\u1ec3m \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u1eed l\u00fd, truy\u1ec1n t\u1ea3i ch\u00ednh x\u00e1c v\u00e0 an to\u00e0n qua c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng kh\u00e1c nhau, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n c\u0103n b\u1ea3n cho k\u1ebft n\u1ed1i m\u1ea1ng to\u00e0n c\u1ea7u ph\u1ee9c t\u1ea1p hi\u1ec7n nay. \u0110\u00e2y l\u00e0 t\u1ea7ng trung gian r\u1ea5t quan tr\u1ecdng gi\u1eefa c\u00e1c t\u1ea7ng v\u1eadt l\u00fd\/ li\u00ean k\u1ebft v\u00e0 t\u1ea7ng v\u1eadn chuy\u1ec3n cao h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-giao-thuc-va-thiet-bi-quan-trong-trong-Network-Layer\"><\/span><strong>C\u00e1c giao th\u1ee9c v\u00e0 thi\u1ebft b\u1ecb quan tr\u1ecdng trong Network Layer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng c\u1ee7a m\u00ecnh, <strong>Network Layer<\/strong> s\u1eed d\u1ee5ng nhi\u1ec1u giao th\u1ee9c v\u00e0 thi\u1ebft b\u1ecb kh\u00e1c nhau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-giao-thuc\"><\/span><strong>C\u00e1c giao th\u1ee9c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Giao th\u1ee9c Internet (IP):<\/strong> \u0110\u00e2y l\u00e0 giao th\u1ee9c x\u01b0\u01a1ng s\u1ed1ng, n\u1ec1n t\u1ea3ng c\u1ee7a m\u1ecdi ho\u1ea1t \u0111\u1ed9ng tr\u00ean Internet. <strong>IP<\/strong> ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u00e1nh \u0111\u1ecba ch\u1ec9 v\u00e0 \u0111\u1ecbnh tuy\u1ebfn. M\u1ecdi thi\u1ebft b\u1ecb tr\u00ean m\u1ea1ng \u0111\u1ec1u ph\u1ea3i tu\u00e2n th\u1ee7 IP \u0111\u1ec3 c\u00f3 th\u1ec3 giao ti\u1ebfp v\u1edbi nhau.<\/li>\n<li><strong>Giao th\u1ee9c qu\u1ea3n l\u00fd th\u00f4ng \u0111i\u1ec7p tr\u00ean Internet (ICMP):<\/strong> Giao th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 g\u1eedi c\u00e1c th\u00f4ng b\u00e1o l\u1ed7i v\u00e0 th\u00f4ng tin tr\u1ea1ng th\u00e1i. L\u1ec7nh <strong><code>ping<\/code><\/strong> m\u00e0 b\u1ea1n th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra k\u1ebft n\u1ed1i ch\u00ednh l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee7a ICMP.<\/li>\n<li><strong>Giao th\u1ee9c ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 (ARP):<\/strong> Giao th\u1ee9c n\u00e0y gi\u00fap t\u00ecm <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-mac-la-gi\/\">\u0111\u1ecba ch\u1ec9 MAC<\/a> v\u1eadt l\u00fd c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb t\u1eeb \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u00f3, ARP li\u00ean k\u1ebft \u0111\u1ecba ch\u1ec9 IP (layer 3) v\u1edbi \u0111\u1ecba ch\u1ec9 MAC (layer 2); n\u00ean xem nh\u01b0 c\u01a1 ch\u1ebf gi\u1eefa t\u1ea7ng 2 v\u00e0 3.<\/li>\n<li><strong>IPsec:<\/strong> Vi\u1ebft t\u1eaft c\u1ee7a Internet Protocol Security, l\u00e0 m\u1ed9t b\u1ed9 giao th\u1ee9c b\u1ea3o m\u1eadt gi\u00fap m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u \u1edf <strong>Network Layer<\/strong>, \u0111\u1ea3m b\u1ea3o an to\u00e0n cho c\u00e1c k\u1ebft n\u1ed1i VPN.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cac-thiet-bi\"><\/span><strong>C\u00e1c thi\u1ebft b\u1ecb<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Router:<\/strong> \u0110\u00e2y l\u00e0 thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng \u0111i\u1ec3n h\u00ecnh nh\u1ea5t c\u1ee7a <strong>Network Layer<\/strong>. <strong>Router<\/strong> c\u00f3 nhi\u1ec7m v\u1ee5 ch\u00ednh l\u00e0 \u0111\u1ecbnh tuy\u1ebfn c\u00e1c g\u00f3i tin gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau. Khi m\u1ed9t g\u00f3i tin \u0111\u1ebfn, router s\u1ebd \u0111\u1ecdc \u0111\u1ecba ch\u1ec9 IP \u0111\u00edch v\u00e0 s\u1eed d\u1ee5ng b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ec3 t\u00ecm ra con \u0111\u01b0\u1eddng hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 chuy\u1ec3n g\u00f3i tin \u0111i.<\/li>\n<li><strong>Layer 3 <a href=\"https:\/\/interdata.vn\/blog\/switch-la-gi\/\">Switch<\/a>:<\/strong> \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i <strong>switch<\/strong> cao c\u1ea5p c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a <strong>Network Layer<\/strong>. <strong>Layer 3 Switch<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c m\u1ea1ng doanh nghi\u1ec7p l\u1edbn \u0111\u1ec3 x\u1eed l\u00fd vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn n\u1ed9i b\u1ed9 v\u1edbi t\u1ed1c \u0111\u1ed9 cao h\u01a1n router truy\u1ec1n th\u1ed1ng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer\"><\/span>Ph\u00e2n bi\u1ec7t Network Layer v\u1edbi c\u00e1c t\u1ea7ng Data Link Layer &amp; Transport Layer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 th\u1ef1c s\u1ef1 hi\u1ec3u vai tr\u00f2 c\u1ee7a Network Layer, b\u1ea1n c\u1ea7n ph\u00e2n bi\u1ec7t n\u00f3 v\u1edbi c\u00e1c t\u1ea7ng l\u00e2n c\u1eadn. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ph\u00e2n th\u00edch chi ti\u1ebft \u0111\u1ec3 b\u1ea1n hi\u1ec3u r\u00f5 v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Network Layer v\u1edbi c\u00e1c t\u1ea7ngLayer 2 &amp; Layer 4:<br \/>\n<!-- B\u1ea3ng so s\u00e1nh OSI Layers (responsive) --><\/p>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, Helvetica, sans-serif; min-width: 720px;\">\n<thead>\n<tr>\n<th style=\"text-align: left; padding: 12px 14px; background: #0D6EFD; color: #ffffff; border: 1px solid #0D6EFD;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"text-align: left; padding: 12px 14px; background: #0D6EFD; color: #ffffff; border: 1px solid #0D6EFD;\">Data Link Layer (Layer 2)<\/th>\n<th style=\"text-align: left; padding: 12px 14px; background: #0D6EFD; color: #ffffff; border: 1px solid #0D6EFD;\">Network Layer (Layer 3)<\/th>\n<th style=\"text-align: left; padding: 12px 14px; background: #0D6EFD; color: #ffffff; border: 1px solid #0D6EFD;\">Transport Layer (Layer 4)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD; background: #f7fbff; width: 18%; font-weight: 600;\">Vai tr\u00f2 ch\u00ednh<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Truy\u1ec1n d\u1eef li\u1ec7u trong c\u00f9ng m\u1ed9t m\u1ea1ng LAN<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">\u0110\u1ecbnh tuy\u1ebfn g\u00f3i tin gi\u1eefa c\u00e1c m\u1ea1ng<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">\u0110\u1ea3m b\u1ea3o truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c \u1ee9ng d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD; background: #f7fbff; font-weight: 600;\">\u0110\u01a1n v\u1ecb d\u1eef li\u1ec7u<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Frame<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Packet (g\u00f3i tin)<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Segment \/ Datagram<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD; background: #f7fbff; font-weight: 600;\">\u0110\u1ecba ch\u1ec9<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">\u0110\u1ecba ch\u1ec9 v\u1eadt l\u00fd (MAC Address)<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">\u0110\u1ecba ch\u1ec9 logic (IP Address)<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">\u0110\u1ecba ch\u1ec9 c\u1ed5ng (Port)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD; background: #f7fbff; font-weight: 600;\">Thi\u1ebft b\u1ecb ti\u00eau bi\u1ec3u<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Switch, Bridge<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">Router, Layer 3 Switch<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">(Ph\u1ea7n m\u1ec1m\/Stack): TCP\/UDP tr\u00ean host<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD; background: #f7fbff; font-weight: 600;\">V\u00ed d\u1ee5<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">G\u1eedi d\u1eef li\u1ec7u t\u1eeb m\u00e1y t\u00ednh n\u00e0y sang m\u00e1y kh\u00e1c trong c\u00f9ng m\u1ed9t v\u0103n ph\u00f2ng<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">G\u1eedi d\u1eef li\u1ec7u t\u1eeb m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n \u1edf H\u00e0 N\u1ed9i sang <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> \u1edf M\u1ef9<\/td>\n<td style=\"padding: 10px 14px; border: 1px solid #0D6EFD;\">G\u1eedi email t\u1eeb \u1ee9ng d\u1ee5ng Gmail c\u1ee7a b\u1ea1n \u0111\u1ebfn \u1ee9ng d\u1ee5ng Gmail c\u1ee7a ng\u01b0\u1eddi kh\u00e1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure id=\"attachment_33018\" aria-describedby=\"caption-attachment-33018\" style=\"width: 977px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-33018\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer-.webp\" alt=\"Ph\u00e2n bi\u1ec7t Network Layer v\u1edbi c\u00e1c t\u1ea7ng Data Link Layer &amp; Transport Layer\u00a0\" width=\"977\" height=\"481\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer-.webp 977w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer--300x148.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-biet-Network-Layer-voi-cac-tang-Data-Link-Layer-Transport-Layer--768x378.webp 768w\" sizes=\"auto, (max-width: 977px) 100vw, 977px\" \/><figcaption id=\"caption-attachment-33018\" class=\"wp-caption-text\">Ph\u00e2n bi\u1ec7t Network Layer v\u1edbi c\u00e1c t\u1ea7ng Data Link Layer &amp; Transport Layer<\/figcaption><\/figure>\n<h2 style=\"overflow-x: auto;\"><span class=\"ez-toc-section\" id=\"Vi-du-thuc-te-ve-hoat-dong-cua-Network-Layer\"><\/span><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Network Layer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng b\u1ea1n \u0111ang g\u1eedi m\u1ed9t g\u00f3i tin t\u1eeb m\u00e1y t\u00ednh c\u00e1 nh\u00e2n \u1edf Vi\u1ec7t Nam \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u1eb7t t\u1ea1i Singapore.<\/p>\n<ol>\n<li><strong>Transport Layer<\/strong> tr\u00ean m\u00e1y b\u1ea1n s\u1ebd ph\u00e2n d\u1eef li\u1ec7u th\u00e0nh c\u00e1c \u0111o\u1ea1n v\u00e0 chuy\u1ec3n xu\u1ed1ng <strong>Network Layer<\/strong>.<\/li>\n<li><strong>Network Layer<\/strong> \u0111\u00f3ng g\u00f3i t\u1eebng \u0111o\u1ea1n d\u1eef li\u1ec7u n\u00e0y th\u00e0nh c\u00e1c <strong>g\u00f3i tin (packet)<\/strong>, th\u00eam v\u00e0o <strong>\u0111\u1ecba ch\u1ec9 IP<\/strong> c\u1ee7a m\u00e1y ch\u1ee7 t\u1ea1i Singapore.<\/li>\n<li>C\u00e1c <strong>g\u00f3i tin<\/strong> n\u00e0y \u0111\u01b0\u1ee3c chuy\u1ec3n xu\u1ed1ng <strong>Data Link Layer<\/strong>, r\u1ed3i \u0111\u01b0\u1ee3c \u0111\u01b0a ra m\u00f4i tr\u01b0\u1eddng m\u1ea1ng v\u1eadt l\u00fd.<\/li>\n<li>Khi c\u00e1c g\u00f3i tin \u0111\u1ebfn <strong>router<\/strong> \u0111\u1ea7u ti\u00ean, router n\u00e0y s\u1ebd \u0111\u1ecdc <strong>\u0111\u1ecba ch\u1ec9 IP<\/strong> \u0111\u00edch, tra c\u1ee9u b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ec3 t\u00ecm \u0111\u01b0\u1eddng \u0111i ph\u00f9 h\u1ee3p nh\u1ea5t, v\u00e0 chuy\u1ec3n g\u00f3i tin \u0111\u1ebfn router ti\u1ebfp theo.<\/li>\n<li>Qu\u00e1 tr\u00ecnh n\u00e0y l\u1eb7p l\u1ea1i qua nhi\u1ec1u <strong>router<\/strong> tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi. M\u1ed7i <strong>router<\/strong> \u0111\u1ec1u th\u1ef1c hi\u1ec7n m\u1ed9t ch\u1ee9c n\u0103ng duy nh\u1ea5t: ch\u1ec9 \u0111\u01b0\u1eddng cho c\u00e1c g\u00f3i tin \u0111i \u0111\u00fang h\u01b0\u1edbng.<\/li>\n<li>Cu\u1ed1i c\u00f9ng, g\u00f3i tin \u0111\u1ebfn \u0111\u01b0\u1ee3c router c\u1ee7a m\u1ea1ng ch\u1ee9a m\u00e1y ch\u1ee7 \u1edf Singapore v\u00e0 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn \u0111\u00edch cu\u1ed1i c\u00f9ng.<\/li>\n<\/ol>\n<p>To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra ch\u1ec9 trong t\u00edch t\u1eafc, ch\u1ee9ng minh \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 v\u00e0 t\u1ed1c \u0111\u1ed9 \u0111\u00e1ng kinh ng\u1ea1c c\u1ee7a <strong>Network Layer<\/strong>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ung-dung-thuc-te-cua-Network-Layer\"><\/span><strong>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Network Layer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Network Layer<\/strong> kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m l\u00fd thuy\u1ebft. N\u00f3 c\u00f3 v\u00f4 s\u1ed1 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, t\u1ea1o n\u00ean n\u1ec1n t\u1ea3ng cho nhi\u1ec1u d\u1ecbch v\u1ee5 ch\u00fang ta d\u00f9ng h\u00e0ng ng\u00e0y.<\/p>\n<p>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a Network Layer (T\u1ea7ng M\u1ea1ng) trong m\u00f4 h\u00ecnh OSI bao g\u1ed3m:<\/p>\n<ul>\n<li>\u0110\u1ecbnh tuy\u1ebfn v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau, gi\u00fap c\u00e1c g\u00f3i tin \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb ngu\u1ed3n \u0111\u1ebfn \u0111\u00edch qua nhi\u1ec1u m\u1ea1ng li\u00ean k\u1ebft ph\u1ee9c t\u1ea1p.<\/li>\n<li>S\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ngu\u1ed3n v\u00e0 \u0111\u00edch c\u1ee7a d\u1eef li\u1ec7u, qu\u1ea3n l\u00fd qu\u00e1 tr\u00ecnh \u0111\u1ecbnh tuy\u1ebfn b\u1eb1ng c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 router.<\/li>\n<li>H\u1ed7 tr\u1ee3 ph\u00e2n m\u1ea3nh v\u00e0 t\u1eadp h\u1ee3p l\u1ea1i c\u00e1c g\u00f3i d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n t\u1ea3i hi\u1ec7u qu\u1ea3 tr\u00ean c\u00e1c \u0111o\u1ea1n m\u1ea1ng c\u00f3 k\u00edch th\u01b0\u1edbc MTU kh\u00e1c nhau.<\/li>\n<li>Tham gia ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> v\u00e0 h\u1ea1n ch\u1ebf t\u1eafc ngh\u1ebdn m\u1ea1ng.<\/li>\n<li>L\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c k\u1ef9 thu\u1eadt <a href=\"https:\/\/interdata.vn\/blog\/bao-mat-mang\/\">b\u1ea3o m\u1eadt m\u1ea1ng<\/a> nh\u01b0 l\u1ecdc \u0111\u1ecba ch\u1ec9 IP, ki\u1ec3m so\u00e1t truy c\u1eadp m\u1ea1ng.<\/li>\n<li>Qu\u1ea3n l\u00fd v\u00e0 x\u1eed l\u00fd c\u00e1c th\u00f4ng b\u00e1o l\u1ed7i m\u1ea1ng th\u00f4ng qua c\u00e1c giao th\u1ee9c h\u1ed7 tr\u1ee3 nh\u01b0 ICMP (Internet Control Message Protocol).<\/li>\n<li>\u1ee8ng d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng <a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">m\u1ea1ng Internet<\/a>, m\u1ea1ng doanh nghi\u1ec7p, chuy\u1ec3n v\u00f9ng gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau, v\u00e0 trong c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng ph\u1ee9c t\u1ea1p \u0111\u00f2i h\u1ecfi \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ed9ng v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng linh ho\u1ea1t.<\/li>\n<\/ul>\n<p>Nh\u01b0 v\u1eady, Network Layer c\u00f3 vai tr\u00f2 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c k\u1ebft n\u1ed1i, \u0111\u1ecbnh tuy\u1ebfn v\u00e0 qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u trong c\u00e1c h\u1ec7 th\u1ed1ng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-Network-Layer-xu-ly-va-dinh-tuyen-goi-tin\"><\/span>C\u00e1ch Network Layer x\u1eed l\u00fd v\u00e0 \u0111\u1ecbnh tuy\u1ebfn g\u00f3i tin<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Xac-dinh-dia-chi-dich\"><\/span>X\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 \u0111\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed7i g\u00f3i d\u1eef li\u1ec7u c\u1ea7n bi\u1ebft \u0111i\u1ec3m \u0111\u1ebfn ch\u00ednh x\u00e1c tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c g\u1eedi \u0111i. Th\u00f4ng tin n\u00e0y th\u01b0\u1eddng th\u1ec3 hi\u1ec7n b\u1eb1ng <strong>\u0111\u1ecba ch\u1ec9 IP<\/strong>. Thi\u1ebft b\u1ecb g\u1eedi ph\u1ea3i n\u1eafm r\u00f5 IP c\u1ee7a thi\u1ebft b\u1ecb nh\u1eadn \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o g\u00f3i tin \u0111\u1ebfn \u0111\u00fang n\u01a1i c\u1ea7n \u0111\u1ebfn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lua-chon-duong-di-toi-uu\"><\/span>L\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng \u0111i t\u1ed1i \u01b0u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi \u0111\u00e3 bi\u1ebft \u0111\u1ecba ch\u1ec9 \u0111\u00edch, <strong>Network Layer<\/strong> s\u1ebd \u00e1p d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ec3 ch\u1ecdn tuy\u1ebfn \u0111\u01b0\u1eddng t\u1ed1t nh\u1ea5t. C\u00e1c router s\u1ebd tham chi\u1ebfu b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a m\u00ecnh v\u00e0 quy\u1ebft \u0111\u1ecbnh con \u0111\u01b0\u1eddng hi\u1ec7u qu\u1ea3 nh\u1ea5t. Tuy\u1ebfn \u0111\u01b0\u1eddng n\u00e0y c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 nh\u01b0 b\u0103ng th\u00f4ng, \u0111\u1ed9 tr\u1ec5 ho\u1eb7c t\u00ecnh tr\u1ea1ng th\u1ef1c t\u1ebf c\u1ee7a m\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Truyen-goi-tin-qua-cac-router\"><\/span>Truy\u1ec1n g\u00f3i tin qua c\u00e1c router<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi tuy\u1ebfn \u0111\u01b0\u1eddng \u0111\u00e3 s\u1eb5n s\u00e0ng, g\u00f3i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n ti\u1ebfp qua t\u1eebng router. M\u1ed7i router nh\u1eadn g\u00f3i t\u1eeb m\u1ed9t \u0111\u1ea7u v\u00e0 g\u1eedi sang \u0111\u1ea7u kia, qu\u00e1 tr\u00ecnh n\u00e0y l\u1eb7p l\u1ea1i cho \u0111\u1ebfn khi g\u00f3i tin \u0111\u1ebfn \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb \u0111\u00edch.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Xu-ly-goi-tin-tai-noi-nhan\"><\/span>X\u1eed l\u00fd g\u00f3i tin t\u1ea1i n\u01a1i nh\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi g\u00f3i d\u1eef li\u1ec7u \u0111\u1ebfn \u0111\u00edch, <strong>Network Layer<\/strong> tr\u00ean thi\u1ebft b\u1ecb nh\u1eadn s\u1ebd \u0111\u1ea3m nh\u1eadn vi\u1ec7c x\u1eed l\u00fd. N\u1ebfu d\u1eef li\u1ec7u b\u1ecb chia nh\u1ecf th\u00e0nh nhi\u1ec1u ph\u1ea7n, l\u1edbp n\u00e0y s\u1ebd ti\u1ebfn h\u00e0nh gh\u00e9p ch\u00fang l\u1ea1i th\u00e0nh n\u1ed9i dung ho\u00e0n ch\u1ec9nh ban \u0111\u1ea7u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dam-bao-tinh-toan-ven-du-lieu\"><\/span>\u0110\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u01b0\u1edbc khi t\u00e1i l\u1eafp v\u00e0 x\u1eed l\u00fd, <strong>Network Layer<\/strong> c\u0169ng ti\u1ebfn h\u00e0nh ki\u1ec3m tra \u0111\u1ec3 ch\u1eafc ch\u1eafn r\u1eb1ng g\u00f3i d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb l\u1ed7i hay th\u1ea5t tho\u00e1t trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-bien-phap-bao-mat-quan-trong-trong-Network-Layer\"><\/span>C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt quan tr\u1ecdng trong Network Layer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-tuong-lua-Firewall\"><\/span>S\u1eed d\u1ee5ng t\u01b0\u1eddng l\u1eeda (Firewall)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u01b0\u1eddng l\u1eeda \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u201cl\u00e1 ch\u1eafn\u201d ki\u1ec3m so\u00e1t lu\u1ed3ng truy c\u1eadp ra v\u00e0o m\u1ea1ng, ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thi\u1ebft l\u1eadp <strong><a href=\"https:\/\/interdata.vn\/blog\/dmz-la-gi\/\">DMZ<\/a> (Demilitarized Zone)<\/strong> nh\u1eb1m b\u1ea3o v\u1ec7 m\u1ea1ng n\u1ed9i b\u1ed9 tr\u01b0\u1edbc r\u1ee7i ro t\u1eeb Internet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Trien-khai-mang-rieng-ao-VPN\"><\/span>Tri\u1ec3n khai m\u1ea1ng ri\u00eang \u1ea3o (VPN)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>VPN gi\u00fap m\u00e3 h\u00f3a k\u1ebft n\u1ed1i gi\u1eefa thi\u1ebft b\u1ecb v\u00e0 m\u1ea1ng, b\u1ea3o \u0111\u1ea3m d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i an to\u00e0n, \u0111\u1eb7c bi\u1ec7t khi ng\u01b0\u1eddi d\u00f9ng c\u1ea7n k\u1ebft n\u1ed1i t\u1eeb xa.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-doan-mang-Network-Segmentation\"><\/span>Ph\u00e2n \u0111o\u1ea1n m\u1ea1ng (Network Segmentation)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c chia nh\u1ecf l\u01b0u l\u01b0\u1ee3ng th\u00e0nh nhi\u1ec1u ph\u00e2n \u0111o\u1ea1n kh\u00e1c nhau gi\u00fap qu\u1ea3n l\u00fd d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 t\u0103ng kh\u1ea3 n\u0103ng \u00e1p d\u1ee5ng c\u00e1c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kiem-soat-quyen-truy-cap-Access-Control\"><\/span>Ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp (Access Control)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ea3m b\u1ea3o ch\u1ec9 ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e9p m\u1edbi c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean m\u1ea1ng. C\u00e1c h\u00ecnh th\u1ee9c ki\u1ec3m so\u00e1t c\u00f3 th\u1ec3 bao g\u1ed3m <strong>x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 (2FA)<\/strong> ho\u1eb7c qu\u1ea3n l\u00fd quy\u1ec1n d\u1ef1a tr\u00ean vai tr\u00f2.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ap-dung-giao-thuc-ma-hoa\"><\/span>\u00c1p d\u1ee5ng giao th\u1ee9c m\u00e3 h\u00f3a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c giao th\u1ee9c nh\u01b0 <strong>TLS (Transport Layer Security)<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00e3 h\u00f3a v\u00e0 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Giam-sat-va-phan-ung-su-co\"><\/span>Gi\u00e1m s\u00e1t v\u00e0 ph\u1ea3n \u1ee9ng s\u1ef1 c\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Doanh nghi\u1ec7p c\u1ea7n th\u01b0\u1eddng xuy\u00ean theo d\u00f5i ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng \u0111\u1ec3 k\u1ecbp th\u1eddi ph\u00e1t hi\u1ec7n d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng. C\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t s\u1ebd gi\u00fap ph\u00e1t hi\u1ec7n s\u1edbm t\u1ea5n c\u00f4ng v\u00e0 \u0111\u01b0a ra bi\u1ec7n ph\u00e1p x\u1eed l\u00fd nhanh ch\u00f3ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cap-nhat-phan-mem-dinh-ky\"><\/span>C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m \u0111\u1ecbnh k\u1ef3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lu\u00f4n duy tr\u00ec h\u1ec7 th\u1ed1ng v\u00e0 ph\u1ea7n m\u1ec1m \u1edf phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 kh\u1eafc ph\u1ee5c k\u1ecbp th\u1eddi nh\u1eefng <a href=\"https:\/\/interdata.vn\/blog\/lo-hong-bao-mat-la-gi\/\">l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt<\/a> c\u00f3 th\u1ec3 b\u1ecb khai th\u00e1c.<\/p>\n<p>Network Layer l\u00e0 m\u1ed9t trong nh\u1eefng t\u1ea7ng quan tr\u1ecdng nh\u1ea5t c\u1ee7a m\u00f4 h\u00ecnh OSI. Vai tr\u00f2 c\u1ee7a n\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng giao th\u00f4ng ph\u1ee9c t\u1ea1p, \u0111\u1ea3m b\u1ea3o m\u1ecdi g\u00f3i tin d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c v\u1eadn chuy\u1ec3n hi\u1ec7u qu\u1ea3 t\u1eeb \u0111i\u1ec3m xu\u1ea5t ph\u00e1t \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac.<\/p>\n<p>Vi\u1ec7c n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 Network Layer kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n hi\u1ec3u c\u00e1ch m\u1ea1ng m\u00e1y t\u00ednh ho\u1ea1t \u0111\u1ed9ng, m\u00e0 c\u00f2n l\u00e0 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc \u0111\u1ec3 ph\u00e1t tri\u1ec3n s\u1ef1 nghi\u1ec7p trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin. H\u00e3y ti\u1ebfp t\u1ee5c t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c t\u1ea7ng kh\u00e1c c\u1ee7a m\u00f4 h\u00ecnh OSI \u0111\u1ec3 c\u00f3 c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n h\u01a1n. InterData tin r\u1eb1ng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc s\u1ebd l\u00e0 ch\u00eca kh\u00f3a cho m\u1ecdi th\u00e0nh c\u00f4ng trong ng\u00e0nh c\u00f4ng ngh\u1ec7.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong m\u1ea1ng m\u00e1y t\u00ednh, 7 t\u1ea7ng c\u1ee7a m\u00f4 h\u00ecnh OSI (Open Systems Interconnection) &#8211; Network Layer (t\u1ea7ng m\u1ea1ng) gi\u1eef vai tr\u00f2 \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng: ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9, \u0111\u1ecbnh tuy\u1ebfn v\u00e0 \u0111\u1ea3m b\u1ea3o g\u00f3i tin \u0111i \u0111\u00fang \u0111\u00edch. V\u1eady Network Layer l\u00e0 g\u00ec trong OSI, ch\u1ee9c n\u0103ng v\u00e0 kh\u00e1c bi\u1ec7t th\u1ebf n\u00e0o<\/p>\n","protected":false},"author":11,"featured_media":33019,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-33012","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\/33012","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=33012"}],"version-history":[{"count":6,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/33012\/revisions"}],"predecessor-version":[{"id":33023,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/33012\/revisions\/33023"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/33019"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=33012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=33012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=33012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}