{"id":4384,"date":"2025-09-11T00:00:00","date_gmt":"2025-09-11T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/ppp-point-to-point-protocol-explained\/"},"modified":"2026-06-10T01:16:47","modified_gmt":"2026-06-10T01:16:47","slug":"ppp-point-to-point-protocol-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ppp-point-to-point-protocol-explained","title":{"rendered":"PPP (Giao th\u1ee9c \u0110i\u1ec3m-\u0111i\u1ec3m) L\u00e0 G\u00ec v\u00e0 C\u00e1ch N\u00f3 Ho\u1ea1t \u0110\u1ed9ng Trong M\u1ea1ng M\u00e1y T\u00ednh"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1.webp\" alt=\"What Is PPP (Point-to-Point Protocol)\uff1f\" class=\"wp-image-4381\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d871b66655864c33a6eb2f4f3fe825c1-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 Gi\u1ea3i th\u00edch PPP (Giao th\u1ee9c \u0110i\u1ec3m-\u0111i\u1ec3m)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PPP (Giao th\u1ee9c \u0110i\u1ec3m-\u0111i\u1ec3m)<\/strong> l\u00e0 m\u1ed9t giao th\u1ee9c l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i <strong>l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m cho ph\u00e9p truy\u1ec1n th\u00f4ng tr\u1ef1c ti\u1ebfp gi\u1eefa hai n\u00fat m\u1ea1ng. \u0110\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a b\u1edfi IETF, PPP cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 v\u1eadn chuy\u1ec3n nhi\u1ec1u lo\u1ea1i g\u00f3i \u1edf l\u1edbp m\u1ea1ng\u2014nh\u01b0 IPv4, IPv6 v\u00e0 c\u00e1c giao th\u1ee9c c\u0169\u2014tr\u00ean c\u00e1c li\u00ean k\u1ebft \u0111i\u1ec3m-\u0111i\u1ec3m, bao g\u1ed3m c\u00e1p n\u1ed1i ti\u1ebfp, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fiber-optic-cable-what-it-is-and-how-it-works-explained\/\">s\u1ee3i quang<\/a>, DSL ho\u1eb7c c\u00e1c \u0111\u01b0\u1eddng thu\u00ea ri\u00eang chuy\u00ean d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c v\u1edbi Ethernet\u2014ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng truy c\u1eadp \u0111a \u0111i\u1ec3m\u2014PPP \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho <strong>truy\u1ec1n th\u00f4ng tr\u1ef1c ti\u1ebfp gi\u1eefa hai n\u00fat<\/strong>, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t giao th\u1ee9c n\u1ec1n t\u1ea3ng cho <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-wide-area-network\/\">m\u1ea1ng di\u1ec7n r\u1ed9ng (WAN) <\/a>v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 truy c\u1eadp Internet \u0111\u1ea7u ti\u00ean.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 C\u00e1c Ch\u1ee9c N\u0103ng C\u1ed1t L\u00f5i C\u1ee7a PPP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPP cung c\u1ea5p ba kh\u1ea3 n\u0103ng thi\u1ebft y\u1ebfu l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh giao th\u1ee9c \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng b\u1edfi c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 v\u00e0 m\u1ea1ng di\u1ec7n r\u1ed9ng doanh nghi\u1ec7p:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Bao b\u1ecdc c\u00e1c G\u00f3i \u1edf L\u1edbp M\u1ea1ng<\/strong><\/p><ul><li><p>PPP bao b\u1ecdc c\u00e1c giao th\u1ee9c m\u1ea1ng kh\u00e1c nhau v\u00e0o m\u1ed9t \u0111\u1ecbnh d\u1ea1ng khung \u0111\u1ed3ng nh\u1ea5t.<\/p><\/li><li><p>N\u00f3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng d\u1ecb c\u1ea5u tr\u00fac v\u00e0 h\u1ed7 tr\u1ee3 \u0111\u1ed3ng th\u1eddi nhi\u1ec1u giao th\u1ee9c.<\/p><\/li><\/ul><\/li><li><p><strong>Thi\u1ebft l\u1eadp v\u00e0 C\u1ea5u h\u00ecnh Li\u00ean k\u1ebft<\/strong><\/p><ul><li><p>PPP s\u1eed d\u1ee5ng <strong>Giao th\u1ee9c \u0110i\u1ec1u khi\u1ec3n Li\u00ean k\u1ebft (LCP)<\/strong> \u0111\u1ec3 thi\u1ebft l\u1eadp, c\u1ea5u h\u00ecnh v\u00e0 ki\u1ec3m tra li\u00ean k\u1ebft gi\u1eefa hai thi\u1ebft b\u1ecb.<\/p><\/li><li><p>C\u00e1c tham s\u1ed1 nh\u01b0 k\u00edch th\u01b0\u1edbc khung t\u1ed1i \u0111a, t\u00f9y ch\u1ecdn n\u00e9n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u01b0\u1ee3c th\u01b0\u01a1ng l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch \u0111\u1ed9ng.<\/p><\/li><\/ul><\/li><li><p><strong>X\u00e1c th\u1ef1c<\/strong><\/p><ul><li><p>PPP h\u1ed7 tr\u1ee3 x\u00e1c th\u1ef1c t\u00f9y ch\u1ecdn b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <strong>PAP (Giao th\u1ee9c X\u00e1c th\u1ef1c M\u1eadt kh\u1ea9u)<\/strong> and <strong>CHAP (Giao th\u1ee9c X\u00e1c th\u1ef1c B\u1eaft tay Th\u1eed th\u00e1ch)<\/strong>.<\/p><\/li><li><p>\u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n m\u1edbi c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o m\u1ea1ng.<\/p><\/li><\/ul><\/li><li><p><strong>H\u1ed7 tr\u1ee3 Nhi\u1ec1u Giao th\u1ee9c<\/strong><\/p><ul><li><p>Th\u00f4ng qua <strong>C\u00e1c Giao th\u1ee9c \u0110i\u1ec1u khi\u1ec3n M\u1ea1ng (NCP)<\/strong> nh\u01b0 IPCP (cho IPv4) v\u00e0 IPV6CP (cho IPv6), PPP c\u00f3 th\u1ec3 x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 nhi\u1ec1u giao th\u1ee9c \u1edf t\u1ea7ng tr\u00ean.<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1589\" height=\"656\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af.png\" alt=\"PPP Process\" class=\"wp-image-4382\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af.png 1589w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-300x124.png 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-1024x423.png 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-768x317.png 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-1536x634.png 1536w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f21c7801fc784db58dc7ea3aaed006af-18x7.png 18w\" sizes=\"(max-width: 1589px) 100vw, 1589px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 C\u1ea5u tr\u00fac Khung PPP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c khung PPP d\u1ef1a tr\u00ean \u0111\u1ecbnh d\u1ea1ng HDLC v\u00e0 bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u1edd (0x7E):<\/strong> Ch\u1ec9 ra \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac c\u1ee7a khung.<\/p><\/li><li><p><strong>\u0110\u1ecba ch\u1ec9 (0xFF):<\/strong> \u0110\u1ecba ch\u1ec9 ph\u00e1t s\u00f3ng, c\u1ed1 \u0111\u1ecbnh trong PPP.<\/p><\/li><li><p><strong>\u0110i\u1ec1u khi\u1ec3n (0x03):<\/strong> Ch\u1ec9 ra th\u00f4ng tin kh\u00f4ng \u0111\u00e1nh s\u1ed1.<\/p><\/li><li><p><strong>Giao th\u1ee9c:<\/strong> X\u00e1c \u0111\u1ecbnh t\u1ea3i \u0111\u01b0\u1ee3c bao b\u1ecdc (v\u00ed d\u1ee5: IPv4, IPv6).<\/p><\/li><li><p><strong>T\u1ea3i:<\/strong> G\u00f3i d\u1eef li\u1ec7u th\u1ef1c t\u1ebf t\u1eeb l\u1edbp m\u1ea1ng.<\/p><\/li><li><p><strong>FCS (Tr\u00ecnh t\u1ef1 Ki\u1ec3m tra Khung):<\/strong> Cung c\u1ea5p ph\u00e1t hi\u1ec7n l\u1ed7i b\u1eb1ng CRC.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea5u tr\u00fac n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c bao b\u1ecdc v\u00e0 ph\u00e1t hi\u1ec7n l\u1ed7i m\u1ed9t c\u00e1ch v\u1eefng ch\u1eafc, ngay c\u1ea3 tr\u00ean c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n d\u1eabn nhi\u1ec5u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 C\u00e1c \u1ee8ng D\u1ee5ng C\u1ee7a PPP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PPP \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng m\u1ea1ng then ch\u1ed1t:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>C\u00e1c K\u1ebft n\u1ed1i WAN<\/strong><\/p><ul><li><p><span class=\"qc-p1-tag\">PPP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u00ean c\u00e1c \u0111\u01b0\u1eddng thu\u00ea ri\u00eang \u0111i\u1ec3m-\u0111i\u1ec3m v\u00e0 <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-packet-over-sonet-sdh-pos\/\"><strong>K\u1ebft n\u1ed1i Packet over SONET\/SDH (POS)<\/strong><\/a><span class=\"qc-p1-tag\"> gi\u1eefa c\u00e1c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn.<\/span><\/p><\/li><\/ul><\/li><li><p><strong>Truy c\u1eadp Internet B\u0103ng th\u00f4ng R\u1ed9ng<\/strong><\/p><ul><li><p>C\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 <strong>PPPoE (PPP tr\u00ean Ethernet)<\/strong> and <strong>PPPoA (PPP tr\u00ean ATM)<\/strong> t\u1eebng l\u00e0 n\u1ec1n t\u1ea3ng trong tri\u1ec3n khai b\u0103ng th\u00f4ng r\u1ed9ng DSL, cho ph\u00e9p c\u00e1c ISP x\u00e1c th\u1ef1c v\u00e0 qu\u1ea3n l\u00fd ng\u01b0\u1eddi d\u00f9ng.<\/p><\/li><\/ul><\/li><li><p><strong>M\u1ea1ng Ri\u00eang \u1ea2o (VPN)<\/strong><\/p><ul><li><p>C\u00e1c gi\u1ea3i ph\u00e1p VPN ban \u0111\u1ea7u t\u1eadn d\u1ee5ng PPP \u0111\u1ec3 bao b\u1ecdc giao th\u1ee9c v\u00e0 x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng, t\u1ea1o n\u1ec1n t\u1ea3ng cho PPTP v\u00e0 c\u00e1c giao th\u1ee9c t\u1ea1o \u0111\u01b0\u1eddng h\u1ea7m li\u00ean quan.<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udc49 V\u00ec Sao PPP V\u1eabn C\u00f2n Quan Tr\u1ecdng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 Ethernet v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-mpls-multiprotocol-label-switching\/\">MPLS<\/a> chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, PPP v\u1eabn \u0111\u00f3ng vai tr\u00f2 trong <strong>c\u00e1c h\u1ec7 th\u1ed1ng WAN c\u0169<\/strong> v\u00e0 nh\u01b0 m\u1ed9t kh\u1ed1i x\u00e2y d\u1ef1ng trong <strong>c\u00e1c ph\u01b0\u01a1ng ph\u00e1p bao b\u1ecdc giao th\u1ee9c<\/strong>. Thi\u1ebft k\u1ebf c\u1ee7a n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nhi\u1ec1u ti\u00eau chu\u1ea9n sau n\u00e0y v\u00e0 v\u1eabn \u0111\u01b0\u1ee3c tham chi\u1ebfu trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u0103ng th\u00f4ng r\u1ed9ng v\u00e0 c\u1ea5p nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi doanh nghi\u1ec7p v\u00e0 k\u1ef9 s\u01b0 l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c li\u00ean k\u1ebft WAN, vi\u1ec7c hi\u1ec3u r\u00f5 PPP v\u1eabn r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 n\u1eafm b\u1eaft c\u00e1ch th\u1ee9c <strong>x\u00e1c th\u1ef1c, bao b\u1ecdc v\u00e0 th\u01b0\u01a1ng l\u01b0\u1ee3ng giao th\u1ee9c<\/strong> \u0111\u00e3 ph\u00e1t tri\u1ec3n trong l\u0129nh v\u1ef1c m\u1ea1ng m\u00e1y t\u00ednh.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u PPP (Giao th\u1ee9c \u0110i\u1ec3m-\u0111\u1ebfn-\u0110i\u1ec3m) l\u00e0 g\u00ec, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3, v\u00e0 l\u00fd do v\u00ec sao PPP quan tr\u1ecdng trong m\u1ea1ng m\u00e1y t\u00ednh. Kh\u00e1m ph\u00e1 c\u00e1c ch\u1ee9c n\u0103ng, c\u1ea5u tr\u00fac khung tin v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a PPP trong m\u1ea1ng di\u1ec7n r\u1ed9ng (WAN), PPPoE v\u00e0 VPN.<\/p>","protected":false},"author":1,"featured_media":4383,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[],"class_list":["post-4384","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4384","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=4384"}],"version-history":[{"count":2,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4384\/revisions"}],"predecessor-version":[{"id":9374,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4384\/revisions\/9374"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4383"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4384"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}