{"id":36003,"date":"2025-11-17T10:42:28","date_gmt":"2025-11-17T03:42:28","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=36003"},"modified":"2025-11-17T15:36:34","modified_gmt":"2025-11-17T08:36:34","slug":"pppoe-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/","title":{"rendered":"PPPoE l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 Giao th\u1ee9c m\u1ea1ng PPPoE"},"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\/pppoe-la-gi\/#PPPoE-la-gi\" >PPPoE 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\/pppoe-la-gi\/#Loi-ich-noi-bat-cua-giao-thuc-PPPoE\" >L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a giao th\u1ee9c PPPoE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Quan-ly-bang-thong-mot-cach-hieu-qua\" >Qu\u1ea3n l\u00fd b\u0103ng th\u00f4ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Bao-mat-thong-tin-duoc-nang-cao\" >B\u1ea3o m\u1eadt th\u00f4ng tin \u0111\u01b0\u1ee3c n\u00e2ng cao<\/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\/pppoe-la-gi\/#Xac-thuc-va-dang-nhap-don-gian\" >X\u00e1c th\u1ef1c v\u00e0 \u0111\u0103ng nh\u1eadp \u0111\u01a1n gi\u1ea3n<\/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\/pppoe-la-gi\/#Quan-ly-ket-noi-linh-hoat-theo-thoi-gian-thuc\" >Qu\u1ea3n l\u00fd k\u1ebft n\u1ed1i linh ho\u1ea1t theo th\u1eddi gian th\u1ef1c<\/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\/pppoe-la-gi\/#Ho-tro-cac-dich-vu-bang-thong-rong\" >H\u1ed7 tr\u1ee3 c\u00e1c d\u1ecbch v\u1ee5 b\u0103ng th\u00f4ng r\u1ed9ng<\/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\/pppoe-la-gi\/#Tuong-thich-va-linh-hoat-voi-nhieu-moi-truong-mang\" >T\u01b0\u01a1ng th\u00edch v\u00e0 linh ho\u1ea1t v\u1edbi nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng m\u1ea1ng<\/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\/pppoe-la-gi\/#Hieu-qua-ve-mat-chi-phi\" >Hi\u1ec7u qu\u1ea3 v\u1ec1 m\u1eb7t chi ph\u00ed<\/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\/pppoe-la-gi\/#Ai-la-nguoi-phat-trien-giao-thuc-PPPoE\" >Ai l\u00e0 ng\u01b0\u1eddi ph\u00e1t tri\u1ec3n giao th\u1ee9c PPPoE?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Cac-thanh-phan-chinh-cua-mot-phien-PPPoE\" >C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a m\u1ed9t phi\u00ean PPPoE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Cach-thuc-hoat-dong-cua-PPPoE\" >C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a PPPoE<\/a><\/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\/pppoe-la-gi\/#Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE\" >\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a giao th\u1ee9c PPPoE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Uu-diem\" >\u01afu \u0111i\u1ec3m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Nhuoc-diem\" >Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/a><\/li><\/ul><\/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\/pppoe-la-gi\/#Khi-nao-nen-su-dung-PPPoE\" >Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng PPPoE?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Su-khac-nhau-giua-PPPoE-va-DHCP-la-gi\" >S\u1ef1 kh\u00e1c nhau gi\u1eefa PPPoE v\u00e0 DHCP 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-18\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Ung-dung-PPPoE-trong-thuc-te-VNPT-FPT-Viettel\" >\u1ee8ng d\u1ee5ng PPPoE trong th\u1ef1c t\u1ebf (VNPT, FPT, Viettel)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Loi-khuyen-khi-su-dung-PPPoE\" >L\u1eddi khuy\u00ean khi s\u1eed d\u1ee5ng PPPoE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Huong-dan-thiet-lap-ket-noi-Internet-qua-PPPoE\" >H\u01b0\u1edbng d\u1eabn thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i Internet qua PPPoE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Buoc-1-Truy-cap-Settings\" >B\u01b0\u1edbc 1: Truy c\u1eadp Settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Buoc-2-Chon-loai-ket-noi\" >B\u01b0\u1edbc 2: Ch\u1ecdn lo\u1ea1i k\u1ebft n\u1ed1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Buoc-3-Nhap-thong-tin-tai-khoan-PPPoE\" >B\u01b0\u1edbc 3: Nh\u1eadp th\u00f4ng tin t\u00e0i kho\u1ea3n PPPoE<\/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\/pppoe-la-gi\/#Buoc-4-Ket-noi\" >B\u01b0\u1edbc 4: K\u1ebft n\u1ed1i<\/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\/pppoe-la-gi\/#Buoc-5-Xac-minh-thong-tin\" >B\u01b0\u1edbc 5: X\u00e1c minh th\u00f4ng tin<\/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\/pppoe-la-gi\/#Buoc-6-Hoan-tat-thiet-lap\" >B\u01b0\u1edbc 6: Ho\u00e0n t\u1ea5t thi\u1ebft l\u1eadp<\/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\/pppoe-la-gi\/#Buoc-7-Su-dung-ket-noi\" >B\u01b0\u1edbc 7: S\u1eed d\u1ee5ng 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-28\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Cac-loi-PPPoE-thuong-gap-va-cach-khac-phuc\" >C\u00e1c l\u1ed7i PPPoE th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Loi-651-Modem-hoac-thiet-bi-ket-noi-khac-da-bao-loi\" >L\u1ed7i 651: Modem (ho\u1eb7c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i kh\u00e1c) \u0111\u00e3 b\u00e1o l\u1ed7i<\/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\/pppoe-la-gi\/#Loi-691-Truy-cap-bi-tu-choi-do-ten-nguoi-dung-hoac-mat-khau-khong-hop-le\" >L\u1ed7i 691: Truy c\u1eadp b\u1ecb t\u1eeb ch\u1ed1i do t\u00ean ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c m\u1eadt kh\u1ea9u kh\u00f4ng h\u1ee3p l\u1ec7<\/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\/pppoe-la-gi\/#Loi-router-khong-ket-noi-duoc-PPPoE\" >L\u1ed7i router kh\u00f4ng k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c PPPoE<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/#Cau-hoi-thuong-gap-ve-PPPoE-FAQ\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 PPPoE (FAQ)<\/a><\/li><\/ul><\/nav><\/div>\n<p>M\u1ea5t m\u1ea1ng \u0111\u1ed9t ng\u1ed9t v\u00e0 kh\u00f4ng hi\u1ec3u PPPoE l\u00e0 g\u00ec khi \u0111\u01b0\u1ee3c k\u1ef9 thu\u1eadt vi\u00ean nh\u1eafc \u0111\u1ebfn? B\u1ea1n kh\u00f4ng h\u1ec1 \u0111\u01a1n \u0111\u1ed9c. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u1ea3m th\u1ea5y b\u1ed1i r\u1ed1i v\u1edbi thu\u1eadt ng\u1eef n\u00e0y. B\u00e0i vi\u1ebft n\u00e0y c\u1ee7a InterData s\u1ebd gi\u1ea3i th\u00edch t\u1ea5t t\u1ea7n t\u1eadt v\u1ec1 giao th\u1ee9c PPPoE m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t, t\u1eeb \u0111\u1ecbnh ngh\u0129a, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng, cho \u0111\u1ebfn h\u01b0\u1edbng d\u1eabn c\u1ea5u h\u00ecnh v\u00e0 s\u1eeda l\u1ed7i chi ti\u1ebft, gi\u00fap b\u1ea1n t\u1ef1 tin l\u00e0m ch\u1ee7 k\u1ebft n\u1ed1i Internet c\u1ee7a m\u00ecnh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"PPPoE-la-gi\"><\/span>PPPoE l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><a href=\"https:\/\/interdata.vn\/blog\/pppoe-la-gi\/\">PPPoE<\/a>\u00a0(Point-to-Point Protocol over Ethernet) <\/strong>l\u00e0 m\u1ed9t <strong>giao th\u1ee9c m\u1ea1ng<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 <strong>t\u1ea1o k\u1ebft n\u1ed1i \u0111i\u1ec3m\u2013\u0111i\u1ec3m (point-to-point) qua m\u1ea1ng Ethernet<\/strong>. N\u00f3 k\u1ebft h\u1ee3p c\u00e1c t\u00ednh n\u0103ng c\u1ee7a <strong>PPP (Point-to-Point Protocol)<\/strong> \u2014 v\u1ed1n d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp gi\u1eefa hai thi\u1ebft b\u1ecb \u2014 v\u1edbi kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u00f4i tr\u01b0\u1eddng <strong>Ethernet ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/strong>.<\/p>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng \u0111\u01b0\u1eddng truy\u1ec1n Internet nh\u00e0 b\u1ea1n l\u00e0 m\u1ed9t c\u00e2u l\u1ea1c b\u1ed9 ri\u00eang. \u0110\u1ec3 v\u00e0o \u0111\u01b0\u1ee3c, b\u1ea1n c\u1ea7n c\u00f3 th\u1ebb th\u00e0nh vi\u00ean. PPPoE ch\u00ednh l\u00e0 quy tr\u00ecnh m\u00e0 ng\u01b0\u1eddi g\u00e1c c\u1ed5ng (<a href=\"https:\/\/interdata.vn\/blog\/router-la-gi\/\">router<\/a> c\u1ee7a b\u1ea1n) tr\u00ecnh th\u1ebb th\u00e0nh vi\u00ean (t\u00e0i kho\u1ea3n username v\u00e0 password) cho ban qu\u1ea3n l\u00fd (nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng &#8211; ISP) \u0111\u1ec3 x\u00e1c nh\u1eadn danh t\u00ednh. M\u1ed9t khi \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn, b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e2u l\u1ea1c b\u1ed9 (m\u1ea1ng Internet).<\/p>\n<figure id=\"attachment_36004\" aria-describedby=\"caption-attachment-36004\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36004\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/PPPoE-la-gi.jpg\" alt=\"PPPoE l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/PPPoE-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/PPPoE-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/PPPoE-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36004\" class=\"wp-caption-text\">PPPoE l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>C\u1ee5 th\u1ec3, PPPoE cho ph\u00e9p:<\/p>\n<ul>\n<li>X\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng username v\u00e0 password (th\u01b0\u1eddng th\u00f4ng qua PAP ho\u1eb7c CHAP).<\/li>\n<li>C\u1ea5p ph\u00e1t <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> \u0111\u1ed9ng cho thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng t\u1eeb ISP.<\/li>\n<li>Truy c\u1eadp Internet c\u00e1 nh\u00e2n ho\u1eb7c doanh nghi\u1ec7p th\u00f4ng qua m\u1ed9t k\u1ebft n\u1ed1i Ethernet duy nh\u1ea5t, nh\u01b0ng v\u1eabn qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c t\u1eebng user ri\u00eang bi\u1ec7t.<\/li>\n<\/ul>\n<p>Trong th\u1ef1c t\u1ebf, giao th\u1ee9c m\u1ea1ng PPPoE th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi ISP t\u1ea1i Vi\u1ec7t Nam (nh\u01b0 Viettel, VNPT, FPT) cho c\u00e1c k\u1ebft n\u1ed1i ADSL, VDSL, ho\u1eb7c c\u00e1p quang \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u0103ng nh\u1eadp c\u1ee7a kh\u00e1ch h\u00e0ng, \u0111\u1ea3m b\u1ea3o b\u1ea3o m\u1eadt, qu\u1ea3n l\u00fd <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> v\u00e0 t\u00ednh to\u00e1n c\u01b0\u1edbc ph\u00ed.<\/p>\n<p>V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, PPPoE l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa hai c\u00f4ng ngh\u1ec7:<\/p>\n<ul>\n<li><strong>PPP (Point-to-Point Protocol):<\/strong> M\u1ed9t giao th\u1ee9c c\u0169 h\u01a1n, d\u00f9ng \u0111\u1ec3 x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng tr\u00ean c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n quay s\u1ed1 (dial-up). \u0110i\u1ec3m m\u1ea1nh c\u1ee7a PPP l\u00e0 kh\u1ea3 n\u0103ng x\u00e1c th\u1ef1c, m\u00e3 h\u00f3a v\u00e0 n\u00e9n d\u1eef li\u1ec7u.<\/li>\n<li><strong>Ethernet:<\/strong> L\u00e0 c\u00f4ng ngh\u1ec7 m\u1ea1ng c\u00f3 d\u00e2y ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay, cho ph\u00e9p nhi\u1ec1u thi\u1ebft b\u1ecb trong m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9 (LAN) giao ti\u1ebfp v\u1edbi nhau.<\/li>\n<\/ul>\n<p>M\u1ee5c \u0111\u00edch ra \u0111\u1eddi c\u1ee7a PPPoE l\u00e0 \u0111\u1ec3 t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd v\u00e0 x\u00e1c th\u1ef1c m\u1ea1nh m\u1ebd c\u1ee7a PPP tr\u00ean n\u1ec1n t\u1ea3ng m\u1ea1ng Ethernet r\u1ed9ng kh\u1eafp. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c nh\u00e0 m\u1ea1ng nh\u01b0 Viettel, FPT, VNPT d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd h\u00e0ng tri\u1ec7u k\u1ebft n\u1ed1i c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>PPPoE l\u00e0 g\u00ec<\/strong> gi\u00fap b\u1ea1n kh\u00f4ng c\u00f2n b\u1ee1 ng\u1ee1 khi c\u1ea7n t\u1ef1 tay c\u1ea5u h\u00ecnh router ho\u1eb7c x\u1eed l\u00fd c\u00e1c s\u1ef1 c\u1ed1 m\u1ea1ng c\u01a1 b\u1ea3n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ich-noi-bat-cua-giao-thuc-PPPoE\"><\/span>L\u1ee3i \u00edch n\u1ed5i b\u1eadt c\u1ee7a giao th\u1ee9c PPPoE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng v\u1eabn b\u0103n kho\u0103n v\u1ec1 l\u1ee3i \u00edch th\u1ef1c s\u1ef1 c\u1ee7a PPPoE. Th\u1ef1c t\u1ebf, giao th\u1ee9c n\u00e0y mang \u0111\u1ebfn nhi\u1ec1u \u01b0u \u0111i\u1ec3m quan tr\u1ecdng nh\u01b0 sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quan-ly-bang-thong-mot-cach-hieu-qua\"><\/span>Qu\u1ea3n l\u00fd b\u0103ng th\u00f4ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>PPPoE gi\u00fap c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) ki\u1ec3m so\u00e1t b\u0103ng th\u00f4ng cho t\u1eebng ng\u01b0\u1eddi d\u00f9ng r\u1ea5t ch\u00ednh x\u00e1c. M\u1ed7i k\u1ebft n\u1ed1i PPPoE l\u00e0 m\u1ed9t phi\u00ean ri\u00eang bi\u1ec7t, nh\u1edd \u0111\u00f3 ISP c\u00f3 th\u1ec3 ph\u00e2n b\u1ed5 <a href=\"https:\/\/interdata.vn\/blog\/network-speed-la-gi\/\">t\u1ed1c \u0111\u1ed9 m\u1ea1ng<\/a> d\u1ef1a tr\u00ean g\u00f3i d\u1ecbch v\u1ee5 ng\u01b0\u1eddi d\u00f9ng \u0111\u0103ng k\u00fd. K\u1ebft qu\u1ea3 l\u00e0 t\u1ea5t c\u1ea3 kh\u00e1ch h\u00e0ng \u0111\u1ec1u c\u00f3 tr\u1ea3i nghi\u1ec7m m\u1ea1ng \u1ed5n \u0111\u1ecbnh, c\u00f4ng b\u1eb1ng, tr\u00e1nh t\u00ecnh tr\u1ea1ng ngh\u1ebdn b\u0103ng th\u00f4ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bao-mat-thong-tin-duoc-nang-cao\"><\/span>B\u1ea3o m\u1eadt th\u00f4ng tin \u0111\u01b0\u1ee3c n\u00e2ng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t \u0111i\u1ec3m m\u1ea1nh kh\u00e1c c\u1ee7a PPPoE l\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u00e0 th\u00f4ng tin \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng. Giao th\u1ee9c PPP b\u00ean trong PPPoE h\u1ed7 tr\u1ee3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u00e1c th\u1ef1c nh\u01b0 PAP (Password <a href=\"https:\/\/interdata.vn\/blog\/authentication-la-gi\/\">Authentication<\/a> Protocol) v\u00e0 CHAP (Challenge Handshake Authentication Protocol).<\/p>\n<p>Nh\u1edd c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi d\u00f9ng h\u1ee3p l\u1ec7 m\u1edbi \u0111\u01b0\u1ee3c ph\u00e9p truy c\u1eadp m\u1ea1ng. Ngo\u00e0i ra, PPPoE c\u00f2n cung c\u1ea5p t\u00ednh n\u0103ng m\u00e3 h\u00f3a d\u1eef li\u1ec7u, gi\u00fap th\u00f4ng tin truy\u1ec1n qua m\u1ea1ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c nguy c\u01a1 x\u00e2m nh\u1eadp.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Xac-thuc-va-dang-nhap-don-gian\"><\/span>X\u00e1c th\u1ef1c v\u00e0 \u0111\u0103ng nh\u1eadp \u0111\u01a1n gi\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u01b0\u1edbc khi truy c\u1eadp Internet, ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i \u0111\u0103ng nh\u1eadp v\u1edbi t\u00ean t\u00e0i kho\u1ea3n v\u00e0 m\u1eadt kh\u1ea9u. Vi\u1ec7c n\u00e0y gi\u00fap ISP d\u1ec5 d\u00e0ng x\u00e1c th\u1ef1c danh t\u00ednh, n\u00e2ng cao b\u1ea3o m\u1eadt v\u00e0 qu\u1ea3n l\u00fd ng\u01b0\u1eddi d\u00f9ng hi\u1ec7u qu\u1ea3. V\u1edbi c\u01a1 ch\u1ebf ki\u1ec3m so\u00e1t truy c\u1eadp, ISP c\u00f3 th\u1ec3 nhanh ch\u00f3ng ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n nh\u1eefng h\u00e0nh vi b\u1ea5t th\u01b0\u1eddng ho\u1eb7c c\u00e1c truy c\u1eadp tr\u00e1i ph\u00e9p.<\/p>\n<figure id=\"attachment_36005\" aria-describedby=\"caption-attachment-36005\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36005\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Loi-ich-cua-giao-thuc-PPPoE-.jpg\" alt=\"L\u1ee3i \u00edch c\u1ee7a giao th\u1ee9c PPPoE\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Loi-ich-cua-giao-thuc-PPPoE-.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Loi-ich-cua-giao-thuc-PPPoE--300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Loi-ich-cua-giao-thuc-PPPoE--768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36005\" class=\"wp-caption-text\">L\u1ee3i \u00edch c\u1ee7a giao th\u1ee9c PPPoE<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Quan-ly-ket-noi-linh-hoat-theo-thoi-gian-thuc\"><\/span>Qu\u1ea3n l\u00fd k\u1ebft n\u1ed1i linh ho\u1ea1t theo th\u1eddi gian th\u1ef1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Giao th\u1ee9c m\u1ea1ng PPPoE cho ph\u00e9p thi\u1ebft l\u1eadp v\u00e0 gi\u00e1m s\u00e1t c\u00e1c phi\u00ean k\u1ebft n\u1ed1i m\u1ed9t c\u00e1ch linh ho\u1ea1t. M\u1ed7i khi ng\u01b0\u1eddi d\u00f9ng k\u1ebft n\u1ed1i, m\u1ed9t phi\u00ean PPPoE m\u1edbi \u0111\u01b0\u1ee3c t\u1ea1o ra, gi\u00fap ISP d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t m\u1ea1ng. Khi phi\u00ean k\u1ebft th\u00fac, t\u00e0i nguy\u00ean m\u1ea1ng \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng, g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n t\u1ed5ng th\u1ec3 hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-cac-dich-vu-bang-thong-rong\"><\/span>H\u1ed7 tr\u1ee3 c\u00e1c d\u1ecbch v\u1ee5 b\u0103ng th\u00f4ng r\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>PPPoE l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c d\u1ecbch v\u1ee5 b\u0103ng th\u00f4ng r\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 ADSL (Asymmetric Digital Subscriber Line). Nh\u1edd kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd b\u0103ng th\u00f4ng, b\u1ea3o m\u1eadt v\u00e0 x\u00e1c th\u1ef1c t\u1ed1t, PPPoE gi\u00fap c\u00e1c d\u1ecbch v\u1ee5 n\u00e0y ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng cao v\u1ec1 t\u1ed1c \u0111\u1ed9 v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng Internet c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tuong-thich-va-linh-hoat-voi-nhieu-moi-truong-mang\"><\/span>T\u01b0\u01a1ng th\u00edch v\u00e0 linh ho\u1ea1t v\u1edbi nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng m\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ho\u1ea1t \u0111\u1ed9ng tr\u00ean n\u1ec1n t\u1ea3ng Ethernet, PPPoE d\u1ec5 d\u00e0ng t\u00edch h\u1ee3p v\u1edbi h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y gi\u00fap ISP tri\u1ec3n khai PPPoE m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i l\u1edbn v\u1ec1 ph\u1ea7n c\u1ee9ng. \u0110\u1ed3ng th\u1eddi, giao th\u1ee9c n\u00e0y h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i k\u1ebft n\u1ed1i, t\u1eeb m\u1ea1ng gia \u0111\u00ecnh, doanh nghi\u1ec7p \u0111\u1ebfn m\u1ea1ng vi\u1ec5n th\u00f4ng, mang l\u1ea1i gi\u1ea3i ph\u00e1p k\u1ebft n\u1ed1i \u0111a n\u0103ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hieu-qua-ve-mat-chi-phi\"><\/span>Hi\u1ec7u qu\u1ea3 v\u1ec1 m\u1eb7t chi ph\u00ed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c tri\u1ec3n khai PPPoE gi\u00fap ISP gi\u1ea3m chi ph\u00ed v\u1eadn h\u00e0nh v\u00e0 b\u1ea3o tr\u00ec m\u1ea1ng. Nh\u1edd qu\u1ea3n l\u00fd t\u1eadp trung v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c, ph\u00e2n b\u1ed5 b\u0103ng th\u00f4ng, nhu c\u1ea7u v\u1ec1 nh\u00e2n l\u1ef1c v\u00e0 c\u00e1c chi ph\u00ed li\u00ean quan \u0111\u1ebfn v\u1eadn h\u00e0nh m\u1ea1ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u \u0111\u00e1ng k\u1ec3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ai-la-nguoi-phat-trien-giao-thuc-PPPoE\"><\/span>Ai l\u00e0 ng\u01b0\u1eddi ph\u00e1t tri\u1ec3n giao th\u1ee9c PPPoE?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Giao th\u1ee9c PPPoE (Point-to-Point Protocol over Ethernet) \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1edd s\u1ef1 h\u1ee3p t\u00e1c gi\u1eefa UUNET, Redback Networks (hi\u1ec7n nay thu\u1ed9c Ericsson) v\u00e0 RouterWare (hi\u1ec7n thu\u1ed9c Wind River Systems) v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 2000. Sau \u0111\u00f3, n\u00f3 d\u1ea7n tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i trong nh\u1eefng n\u0103m ti\u1ebfp theo.<\/p>\n<p>Tr\u01b0\u1edbc th\u1eddi \u0111i\u1ec3m n\u00e0y, giao th\u1ee9c PPP \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 ph\u1ed5 bi\u1ebfn. Tuy nhi\u00ean, v\u1edbi t\u1ed1c \u0111\u1ed9 Internet khi \u0111\u00f3 ch\u1ec9 \u0111\u1ea1t 28 ho\u1eb7c 56 kbit\/s, nhu c\u1ea7u v\u1ec1 k\u1ebft n\u1ed1i nhanh h\u01a1n tr\u1edf n\u00ean c\u1ea5p thi\u1ebft. Th\u00eam v\u00e0o \u0111\u00f3, PPP ch\u1ec9 cho ph\u00e9p k\u1ebft n\u1ed1i m\u1ed9t m\u00e1y t\u00ednh c\u00e1 nh\u00e2n v\u1edbi m\u00e1y ch\u1ee7 c\u1ee7a ISP, kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c nhu c\u1ea7u k\u1ebft n\u1ed1i nhi\u1ec1u thi\u1ebft b\u1ecb c\u00f9ng l\u00fac trong gia \u0111\u00ecnh hay doanh nghi\u1ec7p.<\/p>\n<p>S\u1ef1 b\u00f9ng n\u1ed5 c\u1ee7a Internet v\u00e0 y\u00eau c\u1ea7u v\u1ec1 t\u1ed1c \u0111\u1ed9 truy c\u1eadp cao h\u01a1n \u0111\u00e3 th\u00fac \u0111\u1ea9y s\u1ef1 ra \u0111\u1eddi c\u1ee7a PPPoE, \u0111\u00e1p \u1ee9ng kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i \u0111\u1ed3ng th\u1eddi nhi\u1ec1u m\u00e1y t\u00ednh v\u1edbi \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1nh m\u1ebd, tr\u1edf th\u00e0nh chu\u1ea9n giao th\u1ee9c m\u1ea1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ebfn ng\u00e0y nay.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-thanh-phan-chinh-cua-mot-phien-PPPoE\"><\/span><strong>C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a m\u1ed9t phi\u00ean PPPoE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t k\u1ebft n\u1ed1i s\u1eed d\u1ee5ng giao th\u1ee9c PPPoE \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb ba th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n, ph\u1ed1i h\u1ee3p nh\u1ecbp nh\u00e0ng v\u1edbi nhau:<\/p>\n<ul>\n<li><strong>PPPoE Client (M\u00e1y kh\u00e1ch PPPoE):<\/strong> \u0110\u00e2y ch\u00ednh l\u00e0 thi\u1ebft b\u1ecb \u1edf ph\u00eda ng\u01b0\u1eddi d\u00f9ng, th\u01b0\u1eddng l\u00e0 router WiFi ho\u1eb7c m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n. Nhi\u1ec7m v\u1ee5 c\u1ee7a Client l\u00e0 ch\u1ee7 \u0111\u1ed9ng g\u1eedi y\u00eau c\u1ea7u k\u1ebft n\u1ed1i, k\u00e8m theo th\u00f4ng tin t\u00e0i kho\u1ea3n (username\/password) \u0111\u1ebfn nh\u00e0 m\u1ea1ng.<\/li>\n<li><strong>Access Concentrator (B\u1ed9 t\u1eadp trung truy c\u1eadp &#8211; AC):<\/strong> \u0110\u00e2y l\u00e0 thi\u1ebft b\u1ecb c\u1ee7a nh\u00e0 m\u1ea1ng, \u0111\u1eb7t \u1edf gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 ch\u00ednh. M\u1ed7i khu v\u1ef1c s\u1ebd c\u00f3 m\u1ed9t AC. Khi PPPoE Client g\u1eedi y\u00eau c\u1ea7u, AC s\u1ebd ti\u1ebfp nh\u1eadn, x\u00e1c th\u1ef1c th\u00f4ng tin v\u00e0 t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng h\u1ea7m \u1ea3o (tunnel) \u0111\u1ec3 phi\u00ean k\u1ebft n\u1ed1i ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>PPPoE Server (M\u00e1y ch\u1ee7 PPPoE):<\/strong> L\u00e0 h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 trung t\u00e2m c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet. M\u00e1y ch\u1ee7 n\u00e0y ch\u1ecbu tr\u00e1ch nhi\u1ec7m cu\u1ed1i c\u00f9ng trong vi\u1ec7c ki\u1ec3m tra t\u00e0i kho\u1ea3n, c\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP v\u00e0 qu\u1ea3n l\u00fd c\u00e1c phi\u00ean k\u1ebft n\u1ed1i t\u1eeb ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ul>\n<p>M\u00f4 h\u00ecnh n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh t\u1ed5 ch\u1ee9c v\u00e0 b\u1ea3o m\u1eadt cao, gi\u00fap nh\u00e0 m\u1ea1ng qu\u1ea3n l\u00fd h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-thuc-hoat-dong-cua-PPPoE\"><\/span><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a PPPoE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong m\u00f4 h\u00ecnh TCP\/IP, PPPoE ho\u1ea1t \u0111\u1ed9ng t\u1ea1i l\u1edbp truy c\u1eadp m\u1ea1ng, c\u00f2n trong m\u00f4 h\u00ecnh OSI, n\u00f3 n\u1eb1m \u1edf l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u. Giao th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ea1y tr\u00ean c\u00e1c c\u00f4ng ngh\u1ec7 b\u0103ng th\u00f4ng r\u1ed9ng truy c\u1eadp t\u1eeb xa, \u0111\u1eb7c bi\u1ec7t v\u1edbi nh\u1eefng m\u00f4i tr\u01b0\u1eddng h\u1ed7 tr\u1ee3 c\u1ea5u h\u00ecnh c\u1ea7u n\u1ed1i (bridge).<\/p>\n<p>D\u00f9 nhi\u1ec1u giao th\u1ee9c m\u1edbi ra \u0111\u1eddi, PPPoE v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00e1ng tin c\u1eady v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. N\u00f3 g\u1eafn li\u1ec1n v\u1edbi c\u00e1c nh\u00e0 m\u1ea1ng l\u1edbn, duy tr\u00ec uy t\u00edn trong qu\u1ea3n l\u00fd k\u1ebft n\u1ed1i Internet.<\/p>\n<p>PPPoE v\u1eadn h\u00e0nh theo c\u01a1 ch\u1ebf t\u01b0\u01a1ng t\u1ef1 Point-to-Point Tunneling Protocol, g\u1ed3m hai giai \u0111o\u1ea1n ch\u00ednh: <strong>Discovery<\/strong> v\u00e0 <strong>Session<\/strong>.<\/p>\n<ul>\n<li><strong>Giai \u0111o\u1ea1n Discovery<\/strong>: PPPoE x\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 Ethernet c\u1ee5c b\u1ed9 v\u00e0 t\u1ea1o session ID. Thi\u1ebft b\u1ecb ng\u01b0\u1eddi d\u00f9ng (host) s\u1ebd t\u00ecm nhi\u1ec1u m\u00e1y ch\u1ee7 PPPoE c\u00f3 s\u1eb5n, sau \u0111\u00f3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 ch\u1ecdn m\u00e1y ch\u1ee7 ph\u00f9 h\u1ee3p.<\/li>\n<li><strong>Giai \u0111o\u1ea1n Session<\/strong>: K\u1ebft n\u1ed1i PPP qua Ethernet \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp gi\u1eefa host v\u00e0 server \u0111\u00e3 ch\u1ecdn. D\u1eef li\u1ec7u s\u1ebd truy\u1ec1n qua PPPoE <a href=\"https:\/\/interdata.vn\/blog\/header-la-gi\/\">header<\/a> tr\u00ean li\u00ean k\u1ebft PPP, v\u00e0 t\u1eeb \u0111\u00f3 phi\u00ean l\u00e0m vi\u1ec7c gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a> t\u1eeb xa c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd v\u00e0 ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE\"><\/span><strong>\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a giao th\u1ee9c PPPoE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Giao th\u1ee9c PPPoE \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 m\u1ea1ng l\u1edbn \u01b0a chu\u1ed9ng v\u00ec nhi\u1ec1u l\u00fd do, nh\u01b0ng c\u0169ng \u0111i k\u00e8m m\u1ed9t s\u1ed1 h\u1ea1n ch\u1ebf nh\u1ea5t \u0111\u1ecbnh. Hi\u1ec3u r\u00f5 \u0111i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n bi\u1ebft t\u1ea1i sao k\u1ebft n\u1ed1i Internet c\u1ee7a m\u00ecnh l\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp theo c\u00e1ch n\u00e0y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Uu-diem\"><\/span>\u01afu \u0111i\u1ec3m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Qu\u1ea3n l\u00fd ng\u01b0\u1eddi d\u00f9ng v\u01b0\u1ee3t tr\u1ed9i<\/strong>: Nh\u00e0 m\u1ea1ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng x\u00e1c th\u1ef1c, theo d\u00f5i th\u1eddi gian s\u1eed d\u1ee5ng, t\u00ednh c\u01b0\u1edbc v\u00e0 ng\u1eaft k\u1ebft n\u1ed1i t\u1eebng t\u00e0i kho\u1ea3n ri\u00eang l\u1ebb. \u0110\u00e2y l\u00e0 \u01b0u \u0111i\u1ec3m l\u1edbn nh\u1ea5t.<\/li>\n<li><strong>B\u1ea3o m\u1eadt cao<\/strong>: L\u1edbp x\u00e1c th\u1ef1c b\u1eb1ng t\u00e0i kho\u1ea3n t\u1ea1o ra m\u1ed9t r\u00e0o c\u1ea3n an ninh, ng\u0103n ch\u1eb7n c\u00e1c truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/li>\n<li><strong>Linh ho\u1ea1t trong c\u1ea5p ph\u00e1t IP<\/strong>: PPPoE cho ph\u00e9p nh\u00e0 m\u1ea1ng c\u1ea5p ph\u00e1t IP \u0111\u1ed9ng m\u1ed9t c\u00e1ch linh ho\u1ea1t ho\u1eb7c g\u00e1n <a href=\"https:\/\/interdata.vn\/blog\/ip-tinh\/\">IP t\u0129nh<\/a> cho c\u00e1c kh\u00e1ch h\u00e0ng doanh nghi\u1ec7p c\u00f3 nhu c\u1ea7u.<\/li>\n<li><strong>D\u1ec5 d\u00e0ng tri\u1ec3n khai<\/strong>: T\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c h\u1ea1 t\u1ea7ng m\u1ea1ng Ethernet c\u00f3 s\u1eb5n m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i l\u1edbn.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Nhuoc-diem\"><\/span>Nh\u01b0\u1ee3c \u0111i\u1ec3m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>C\u1ea5u h\u00ecnh ph\u1ee9c t\u1ea1p h\u01a1n<\/strong>: Ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i nh\u1eadp \u0111\u00fang username v\u00e0 password. N\u1ebfu qu\u00ean ho\u1eb7c nh\u1eadp sai, s\u1ebd kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i.<\/li>\n<li><strong>Hi\u1ec7u su\u1ea5t b\u1ecb \u1ea3nh h\u01b0\u1edfng nh\u1eb9<\/strong>: D\u1eef li\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c &#8220;\u0111\u00f3ng g\u00f3i&#8221; th\u00eam m\u1ed9t l\u1edbp header c\u1ee7a PPPoE (8 bytes), l\u00e0m gi\u1ea3m k\u00edch th\u01b0\u1edbc g\u00f3i tin t\u1ed1i \u0111a (MTU) t\u1eeb 1500 bytes xu\u1ed1ng 1492 bytes. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t ch\u00fat \u0111\u1ed9 tr\u1ec5 kh\u00f4ng \u0111\u00e1ng k\u1ec3.<\/li>\n<li><strong>Ph\u1ee5 thu\u1ed9c v\u00e0o th\u00f4ng tin \u0111\u0103ng nh\u1eadp<\/strong>: N\u1ebfu l\u00e0m m\u1ea5t phi\u1ebfu th\u00f4ng tin ch\u1ee9a t\u00e0i kho\u1ea3n PPPoE, ng\u01b0\u1eddi d\u00f9ng s\u1ebd ph\u1ea3i li\u00ean h\u1ec7 t\u1ed5ng \u0111\u00e0i \u0111\u1ec3 xin c\u1ea5p l\u1ea1i, g\u00e2y b\u1ea5t ti\u1ec7n.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/strong>: M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u0169 ho\u1eb7c \u0111\u1eb7c th\u00f9 c\u00f3 th\u1ec3 g\u1eb7p v\u1ea5n \u0111\u1ec1 khi thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i PPPoE.<\/li>\n<\/ul>\n<figure id=\"attachment_36006\" aria-describedby=\"caption-attachment-36006\" style=\"width: 1020px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-36006\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE-1024x384.jpg\" alt=\"\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a giao th\u1ee9c PPPoE\" width=\"1020\" height=\"383\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE-1024x384.jpg 1024w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE-300x113.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE-768x288.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Uu-va-nhuoc-diem-cua-giao-thuc-PPPoE.jpg 1200w\" sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/><figcaption id=\"caption-attachment-36006\" class=\"wp-caption-text\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a giao th\u1ee9c PPPoE<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Khi-nao-nen-su-dung-PPPoE\"><\/span><strong>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng PPPoE?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Giao th\u1ee9c m\u1ea1ng PPPoE l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) khi h\u1ecd c\u1ea7n m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u1ec3 qu\u1ea3n l\u00fd h\u00e0ng tri\u1ec7u k\u1ebft n\u1ed1i thu\u00ea bao b\u0103ng th\u00f4ng r\u1ed9ng nh\u01b0 ADSL v\u00e0 c\u00e1p quang (FTTH). Vi\u1ec7c y\u00eau c\u1ea7u x\u00e1c th\u1ef1c gi\u00fap nh\u00e0 m\u1ea1ng ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c ai \u0111ang s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5, \u00e1p d\u1ee5ng c\u00e1c g\u00f3i c\u01b0\u1edbc kh\u00e1c nhau v\u00e0 \u0111\u1ea3m b\u1ea3o an ninh h\u1ec7 th\u1ed1ng.<\/p>\n<p>T\u1ea1i Vi\u1ec7t Nam, h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 m\u1ea1ng l\u1edbn bao g\u1ed3m <strong>VNPT, Viettel, v\u00e0 FPT<\/strong> \u0111\u1ec1u s\u1eed d\u1ee5ng giao th\u1ee9c PPPoE cho c\u00e1c g\u00f3i c\u01b0\u1edbc Internet c\u00e1 nh\u00e2n v\u00e0 h\u1ed9 gia \u0111\u00ecnh. Khi b\u1ea1n \u0111\u0103ng k\u00fd l\u1eafp m\u1ea1ng, k\u1ef9 thu\u1eadt vi\u00ean s\u1ebd lu\u00f4n cung c\u1ea5p cho b\u1ea1n m\u1ed9t h\u1ee3p \u0111\u1ed3ng ho\u1eb7c phi\u1ebfu th\u00f4ng tin, trong \u0111\u00f3 c\u00f3 ghi r\u00f5 &#8220;T\u00ean ng\u01b0\u1eddi d\u00f9ng\/M\u1eadt kh\u1ea9u&#8221; ho\u1eb7c &#8220;Username\/Password PPPoE&#8221;. \u0110\u00e2y ch\u00ednh l\u00e0 th\u00f4ng tin b\u1eaft bu\u1ed9c \u0111\u1ec3 c\u1ea5u h\u00ecnh modem ho\u1eb7c router WiFi c\u1ee7a b\u1ea1n.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00f4ng y\u00eau c\u1ea7u qu\u1ea3n l\u00fd truy c\u1eadp ch\u1eb7t ch\u1ebd nh\u01b0 m\u1ea1ng n\u1ed9i b\u1ed9 c\u00f4ng ty, qu\u00e1n c\u00e0 ph\u00ea, ho\u1eb7c s\u00e2n bay, ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng giao th\u1ee9c DHCP. DHCP cho ph\u00e9p c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i v\u00e0 nh\u1eadn \u0111\u1ecba ch\u1ec9 IP t\u1ef1 \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n b\u1ea5t k\u1ef3 b\u01b0\u1edbc x\u00e1c th\u1ef1c n\u00e0o, mang l\u1ea1i s\u1ef1 ti\u1ec7n l\u1ee3i t\u1ed1i \u0111a.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Su-khac-nhau-giua-PPPoE-va-DHCP-la-gi\"><\/span><strong>S\u1ef1 kh\u00e1c nhau gi\u1eefa PPPoE v\u00e0 DHCP l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng nh\u1ea7m l\u1eabn gi\u1eefa PPPoE v\u00e0 DHCP v\u00ec c\u1ea3 hai \u0111\u1ec1u li\u00ean quan \u0111\u1ebfn vi\u1ec7c c\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP. Tuy nhi\u00ean, m\u1ee5c \u0111\u00edch v\u00e0 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang ho\u00e0n to\u00e0n kh\u00e1c nhau. Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>PPPoE l\u00e0 g\u00ec<\/strong> v\u00e0 DHCP l\u00e0 g\u00ec s\u1ebd gi\u00fap b\u1ea1n th\u1ea5y r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t.<\/p>\n<p>B\u1ea3ng so s\u00e1nh tr\u1ef1c quan d\u01b0\u1edbi \u0111\u00e2y s\u1ebd l\u00e0m r\u00f5 v\u1ea5n \u0111\u1ec1:<\/p>\n<table style=\"width: 100%; max-width: 100%; border-collapse: collapse; font-family: Arial,Helvetica,sans-serif; box-shadow: 0 6px 18px rgba(12,64,244,0.08); margin: 16px 0;\"><!-- Header row --><\/p>\n<tbody>\n<tr>\n<th style=\"padding: 14px 12px; font-size: 15px; color: #ffffff; background: linear-gradient(90deg, #0c40f4 0%, #077ffa 50%, #0497fc 100%); border-bottom: 3px solid rgba(0, 0, 0, 0.06); text-align: center;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"padding: 14px 12px; font-size: 15px; color: #ffffff; background: linear-gradient(90deg, #0c40f4 0%, #077ffa 50%, #0497fc 100%); border-bottom: 3px solid rgba(0, 0, 0, 0.06); text-align: center;\">PPPoE (Point-to-Point Protocol over Ethernet)<\/th>\n<th style=\"padding: 14px 12px; font-size: 15px; color: #ffffff; background: linear-gradient(90deg, #0c40f4 0%, #077ffa 50%, #0497fc 100%); border-bottom: 3px solid rgba(0, 0, 0, 0.06); text-align: center;\">DHCP (<a href=\"https:\/\/interdata.vn\/blog\/dhcp-la-gi\/\">Dynamic Host Configuration Protocol<\/a>)<\/th>\n<\/tr>\n<p><!-- Row: M\u1ee5c \u0111\u00edch ch\u00ednh --><\/p>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">M\u1ee5c \u0111\u00edch ch\u00ednh<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">X\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng v\u00e0 thi\u1ebft l\u1eadp phi\u00ean k\u1ebft n\u1ed1i \u0111\u1ec3 truy c\u1eadp m\u1ea1ng WAN (Internet).<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">C\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP t\u1ef1 \u0111\u1ed9ng v\u00e0 c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh m\u1ea1ng cho c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng LAN (m\u1ea1ng n\u1ed9i b\u1ed9).<\/td>\n<\/tr>\n<p><!-- Row: Y\u00eau c\u1ea7u --><\/p>\n<tr style=\"background: #f7fbff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">Y\u00eau c\u1ea7u<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">B\u1eaft bu\u1ed9c ph\u1ea3i c\u00f3 Username v\u00e0 Password do nh\u00e0 m\u1ea1ng cung c\u1ea5p.<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">Kh\u00f4ng y\u00eau c\u1ea7u th\u00f4ng tin x\u00e1c th\u1ef1c. K\u1ebft n\u1ed1i ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng.<\/td>\n<\/tr>\n<p><!-- Row: L\u1edbp m\u1ea1ng --><\/p>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">L\u1edbp m\u1ea1ng<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">Ho\u1ea1t \u0111\u1ed9ng \u1edf L\u1edbp 2 (<a href=\"https:\/\/interdata.vn\/blog\/data-link-layer-la-gi\/\">Data Link Layer<\/a>). T\u1ea1o ra m\u1ed9t k\u1ebft n\u1ed1i \u0111i\u1ec3m-\u0111i\u1ec3m \u1ea3o.<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">Ho\u1ea1t \u0111\u1ed9ng \u1edf L\u1edbp 7 (Application Layer).<\/td>\n<\/tr>\n<p><!-- Row: \u0110\u1ed9 ph\u1ee9c t\u1ea1p --><\/p>\n<tr style=\"background: #f7fbff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">\u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">C\u1ea5u h\u00ecnh ph\u1ee9c t\u1ea1p h\u01a1n, y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng nh\u1eadp th\u00f4ng tin th\u1ee7 c\u00f4ng.<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">R\u1ea5t \u0111\u01a1n gi\u1ea3n, g\u1ea7n nh\u01b0 &#8220;c\u1eafm l\u00e0 ch\u1ea1y&#8221; (Plug-and-Play).<\/td>\n<\/tr>\n<p><!-- Row: Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng --><\/p>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">K\u1ebft n\u1ed1i t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (FPT, Viettel, VNPT).<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">M\u1ea1ng gia \u0111\u00ecnh (t\u1eeb router c\u1ea5p IP cho \u0111i\u1ec7n tho\u1ea1i, laptop), m\u1ea1ng v\u0103n ph\u00f2ng, qu\u00e1n c\u00e0 ph\u00ea, wifi c\u00f4ng c\u1ed9ng.<\/td>\n<\/tr>\n<p><!-- Row: V\u00ed d\u1ee5 th\u1ef1c t\u1ebf --><\/p>\n<tr style=\"background: #f7fbff;\">\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; font-weight: 600; color: #112a66;\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">B\u1ea1n nh\u1eadp t\u00e0i kho\u1ea3n <em>dichvuinter.net<\/em> v\u00e0o router \u0111\u1ec3 c\u00f3 Internet.<\/td>\n<td style=\"padding: 12px; border-top: 1px solid #e9f1ff; vertical-align: top; color: #243b7a;\">\u0110i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n t\u1ef1 \u0111\u1ed9ng k\u1ebft n\u1ed1i WiFi nh\u00e0 v\u00e0 nh\u1eadn \u0111\u1ecba ch\u1ec9 IP <strong>192.168.1.10<\/strong>.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i l\u1ef1a ch\u1ecdn gi\u1eefa PPPoE v\u00e0 DHCP. Ch\u00fang ph\u1ee5c v\u1ee5 hai m\u1ee5c \u0111\u00edch kh\u00e1c nhau v\u00e0 th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng c\u00f9ng l\u00fac. Router c\u1ee7a b\u1ea1n s\u1ebd d\u00f9ng <strong>PPPoE<\/strong> \u0111\u1ec3 &#8220;n\u00f3i chuy\u1ec7n&#8221; v\u1edbi nh\u00e0 m\u1ea1ng v\u00e0 l\u1ea5y k\u1ebft n\u1ed1i Internet. Sau \u0111\u00f3, router s\u1ebd b\u1eadt t\u00ednh n\u0103ng <strong><a href=\"https:\/\/interdata.vn\/blog\/dhcp-server-la-gi\/\">DHCP Server<\/a><\/strong> \u0111\u1ec3 c\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP cho c\u00e1c thi\u1ebft b\u1ecb trong nh\u00e0 b\u1ea1n (laptop, \u0111i\u1ec7n tho\u1ea1i, TV).<\/p>\n<figure id=\"attachment_36007\" aria-describedby=\"caption-attachment-36007\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-36007\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Su-khac-nhau-giua-PPPoE-va-DHCP-1024x505.webp\" alt=\"S\u1ef1 kh\u00e1c nhau gi\u1eefa PPPoE v\u00e0 DHCP\" width=\"800\" height=\"394\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Su-khac-nhau-giua-PPPoE-va-DHCP-1024x505.webp 1024w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Su-khac-nhau-giua-PPPoE-va-DHCP-300x148.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Su-khac-nhau-giua-PPPoE-va-DHCP-768x379.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Su-khac-nhau-giua-PPPoE-va-DHCP.webp 1065w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36007\" class=\"wp-caption-text\">S\u1ef1 kh\u00e1c nhau gi\u1eefa PPPoE v\u00e0 DHCP<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Ung-dung-PPPoE-trong-thuc-te-VNPT-FPT-Viettel\"><\/span><strong>\u1ee8ng d\u1ee5ng PPPoE trong th\u1ef1c t\u1ebf (VNPT, FPT, Viettel)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u1ea1i Vi\u1ec7t Nam, PPPoE l\u00e0 x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a h\u1ec7 th\u1ed1ng m\u1ea1ng Internet b\u0103ng th\u00f4ng r\u1ed9ng cho kh\u00e1ch h\u00e0ng c\u00e1 nh\u00e2n. Vi\u1ec7c tri\u1ec3n khai PPPoE mang l\u1ea1i l\u1ee3i \u00edch to l\u1edbn cho c\u00e1c ISP h\u00e0ng \u0111\u1ea7u.<\/p>\n<ul>\n<li><strong>PPPoE Viettel:<\/strong> Viettel s\u1eed d\u1ee5ng PPPoE \u0111\u1ec3 qu\u1ea3n l\u00fd m\u1ea1ng l\u01b0\u1edbi kh\u00e1ch h\u00e0ng c\u00e1p quang r\u1ed9ng kh\u1eafp c\u1ee7a m\u00ecnh. T\u00e0i kho\u1ea3n PPPoE c\u1ee7a Viettel th\u01b0\u1eddng \u0111\u01b0\u1ee3c cung c\u1ea5p tr\u00ean phi\u1ebfu nghi\u1ec7m thu khi l\u1eafp \u0111\u1eb7t. Vi\u1ec7c n\u00e0y gi\u00fap Viettel d\u1ec5 d\u00e0ng ph\u00e2n lo\u1ea1i kh\u00e1ch h\u00e0ng theo g\u00f3i c\u01b0\u1edbc (v\u00ed d\u1ee5: SuperNet1, SuperNet5) v\u00e0 \u00e1p d\u1ee5ng c\u00e1c ch\u00ednh s\u00e1ch b\u0103ng th\u00f4ng t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<li><strong>PPPoE VNPT:<\/strong> VNPT, v\u1edbi l\u1ecbch s\u1eed l\u00e2u \u0111\u1eddi, c\u0169ng d\u1ef1a v\u00e0o PPPoE cho d\u1ecbch v\u1ee5 FiberVNN c\u1ee7a m\u00ecnh. H\u1ec7 th\u1ed1ng n\u00e0y cho ph\u00e9p VNPT ki\u1ec3m so\u00e1t truy c\u1eadp, \u0111\u1ea3m b\u1ea3o ch\u1ec9 nh\u1eefng thu\u00ea bao h\u1ee3p l\u1ec7 m\u1edbi c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng h\u1ea1 t\u1ea7ng m\u1ea1ng, \u0111\u1ed3ng th\u1eddi h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt t\u1eeb xa b\u1eb1ng c\u00e1ch qu\u1ea3n l\u00fd phi\u00ean k\u1ebft n\u1ed1i c\u1ee7a kh\u00e1ch h\u00e0ng.<\/li>\n<li><strong>PPPoE FPT:<\/strong> FPT Telecom l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh kh\u00e1c. T\u00e0i kho\u1ea3n PPPoE c\u1ee7a FPT kh\u00f4ng ch\u1ec9 d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i Internet m\u00e0 c\u00f2n li\u00ean quan \u0111\u1ebfn c\u00e1c d\u1ecbch v\u1ee5 gi\u00e1 tr\u1ecb gia t\u0103ng kh\u00e1c nh\u01b0 FPT Play. Vi\u1ec7c qu\u1ea3n l\u00fd t\u1eadp trung qua PPPoE gi\u00fap FPT t\u00edch h\u1ee3p v\u00e0 qu\u1ea3n l\u00fd nhi\u1ec1u d\u1ecbch v\u1ee5 tr\u00ean m\u1ed9t k\u1ebft n\u1ed1i duy nh\u1ea5t.<\/li>\n<\/ul>\n<p>L\u00fd do ch\u00ednh m\u00e0 c\u1ea3 ba \u00f4ng l\u1edbn n\u00e0y \u0111\u1ec1u ch\u1ecdn PPPoE l\u00e0 v\u00ec kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd t\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng c\u1ef1c k\u1ef3 chi ti\u1ebft, gi\u00fap h\u1ecd gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n v\u1ec1 kinh doanh, v\u1eadn h\u00e0nh v\u00e0 h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Loi-khuyen-khi-su-dung-PPPoE\"><\/span>L\u1eddi khuy\u00ean khi s\u1eed d\u1ee5ng PPPoE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a c\u00e1c l\u1ee3i \u00edch c\u1ee7a PPPoE, b\u1ea1n n\u00ean l\u01b0u \u00fd nh\u1eefng \u0111i\u1ec3m sau:<\/p>\n<ul>\n<li>Ki\u1ec3m tra v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng t\u00e0i kho\u1ea3n PPPoE \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang.<\/li>\n<li>Th\u01b0\u1eddng xuy\u00ean theo d\u00f5i b\u0103ng th\u00f4ng \u0111\u1ec3 n\u00e2ng c\u1ea5p g\u00f3i d\u1ecbch v\u1ee5 khi c\u1ea7n.<\/li>\n<li>N\u1eafm c\u00e1ch x\u1eed l\u00fd c\u00e1c s\u1ef1 c\u1ed1 ph\u1ed5 bi\u1ebfn c\u1ee7a k\u1ebft n\u1ed1i PPPoE.<\/li>\n<li>N\u1ebfu g\u1eb7p v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p, li\u00ean h\u1ec7 ngay v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/li>\n<\/ul>\n<p>V\u1edbi PPPoE, vi\u1ec7c k\u1ebft n\u1ed1i Internet b\u0103ng th\u00f4ng r\u1ed9ng tr\u1edf n\u00ean d\u1ec5 d\u00e0ng, \u0111\u1ed3ng th\u1eddi b\u1ea3o m\u1eadt v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n r\u00f5 r\u1ec7t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-thiet-lap-ket-noi-Internet-qua-PPPoE\"><\/span>H\u01b0\u1edbng d\u1eabn thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i Internet qua PPPoE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u1ebfu ISP c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng PPPoE, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb \u00edt nh\u1ea5t hai th\u1ee9:<\/p>\n<ol>\n<li>M\u1ed9t <strong>ID (t\u00ean ng\u01b0\u1eddi d\u00f9ng)<\/strong> v\u00e0 <strong>m\u1eadt kh\u1ea9u<\/strong> do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 cung c\u1ea5p.<\/li>\n<li>M\u1ed9t <strong>modem-router<\/strong> \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng c\u1ee7a ISP.<\/li>\n<\/ol>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p ISP kh\u00f4ng c\u1ea5p b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 b\u1ea1n ch\u01b0a mua thi\u1ebft b\u1ecb n\u00e0y, b\u1ea1n s\u1ebd ph\u1ea3i thi\u1ebft l\u1eadp PPPoE tr\u00ean m\u00e1y t\u00ednh th\u1ee7 c\u00f4ng. C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n nh\u01b0 sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-1-Truy-cap-Settings\"><\/span>B\u01b0\u1edbc 1: Truy c\u1eadp Settings<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1ea5n <strong>Win + I<\/strong> \u0111\u1ec3 m\u1edf Settings. Trong Settings, ch\u1ecdn <strong>Network &amp; Internet<\/strong>, sau \u0111\u00f3 v\u00e0o <strong>Dial-up<\/strong> \u1edf b\u00ean tr\u00e1i c\u1eeda s\u1ed5 v\u00e0 nh\u1ea5p <strong>Set up a new connection<\/strong> \u1edf b\u00ean ph\u1ea3i. L\u00fac n\u00e0y c\u1eeda s\u1ed5 <strong>Set Up a Connection or Network<\/strong> s\u1ebd hi\u1ec7n ra.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-2-Chon-loai-ket-noi\"><\/span>B\u01b0\u1edbc 2: Ch\u1ecdn lo\u1ea1i k\u1ebft n\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong danh s\u00e1ch c\u00e1c t\u00f9y ch\u1ecdn, ch\u1ecdn <strong>Connect to the Internet<\/strong>, sau \u0111\u00f3 nh\u1ea5n <strong>Next<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-3-Nhap-thong-tin-tai-khoan-PPPoE\"><\/span>B\u01b0\u1edbc 3: Nh\u1eadp th\u00f4ng tin t\u00e0i kho\u1ea3n PPPoE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi c\u1eeda s\u1ed5 c\u00e0i \u0111\u1eb7t k\u1ebft n\u1ed1i PPPoE xu\u1ea5t hi\u1ec7n, nh\u1eadp <strong>t\u00ean ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1eadt kh\u1ea9u<\/strong> do ISP cung c\u1ea5p. N\u1ebfu mu\u1ed1n cho ph\u00e9p ng\u01b0\u1eddi kh\u00e1c truy c\u1eadp m\u00e1y t\u00ednh th\u00f4ng qua k\u1ebft n\u1ed1i n\u00e0y, b\u1eadt t\u00f9y ch\u1ecdn <strong>Allow other people to use this connection<\/strong>. L\u01b0u \u00fd, \u0111\u1ec3 b\u1eadt t\u00ednh n\u0103ng n\u00e0y, b\u1ea1n c\u1ea7n quy\u1ec1n qu\u1ea3n tr\u1ecb.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-4-Ket-noi\"><\/span>B\u01b0\u1edbc 4: K\u1ebft n\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1ea5n <strong>Connect<\/strong> sau khi ho\u00e0n t\u1ea5t c\u00e1c c\u00e0i \u0111\u1eb7t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-5-Xac-minh-thong-tin\"><\/span>B\u01b0\u1edbc 5: X\u00e1c minh th\u00f4ng tin<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u00ecnh h\u01b0\u1edbng d\u1eabn s\u1ebd ki\u1ec3m tra <strong>t\u00ean ng\u01b0\u1eddi d\u00f9ng, m\u1eadt kh\u1ea9u<\/strong> v\u00e0 x\u00e1c nh\u1eadn k\u1ebft n\u1ed1i Internet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-6-Hoan-tat-thiet-lap\"><\/span>B\u01b0\u1edbc 6: Ho\u00e0n t\u1ea5t thi\u1ebft l\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu m\u1ecdi th\u1ee9 \u1ed5n, b\u1ea1n s\u1ebd nh\u1eadn th\u00f4ng b\u00e1o <strong>\u201cThe connection to the Internet is ready to use\u201d<\/strong>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-7-Su-dung-ket-noi\"><\/span>B\u01b0\u1edbc 7: S\u1eed d\u1ee5ng k\u1ebft n\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi tho\u00e1t kh\u1ecfi tr\u00ecnh h\u01b0\u1edbng d\u1eabn, k\u1ebft n\u1ed1i PPPoE s\u1ebd ho\u1ea1t \u0111\u1ed9ng. B\u1ea1n c\u00f3 th\u1ec3 m\u1edf tr\u00ecnh duy\u1ec7t web ho\u1eb7c b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o y\u00eau c\u1ea7u Internet \u0111\u1ec3 b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-loi-PPPoE-thuong-gap-va-cach-khac-phuc\"><\/span><strong>C\u00e1c l\u1ed7i PPPoE th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi k\u1ebft n\u1ed1i giao th\u1ee9c PPPoE g\u1eb7p s\u1ef1 c\u1ed1, b\u1ea1n s\u1ebd b\u1ecb m\u1ea5t Internet. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 h\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 kh\u1eafc ph\u1ee5c t\u1ea1i nh\u00e0 tr\u01b0\u1edbc khi g\u1ecdi t\u1ed5ng \u0111\u00e0i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Loi-651-Modem-hoac-thiet-bi-ket-noi-khac-da-bao-loi\"><\/span><strong>L\u1ed7i 651: Modem (ho\u1eb7c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i kh\u00e1c) \u0111\u00e3 b\u00e1o l\u1ed7i<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t l\u1ed7i r\u1ea5t chung chung, th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 v\u1eadt l\u00fd ho\u1eb7c ph\u1ea7n m\u1ec1m gi\u1eefa m\u00e1y t\u00ednh\/router v\u00e0 modem.<\/p>\n<p><strong>Nguy\u00ean nh\u00e2n:<\/strong><\/p>\n<ul>\n<li>D\u00e2y c\u00e1p m\u1ea1ng (LAN) b\u1ecb l\u1ecfng, \u0111\u1ee9t ho\u1eb7c c\u1eafm sai c\u1ed5ng.<\/li>\n<li>Card m\u1ea1ng c\u1ee7a m\u00e1y t\u00ednh ho\u1eb7c c\u1ed5ng LAN tr\u00ean router b\u1ecb l\u1ed7i.<\/li>\n<li>Driver card m\u1ea1ng tr\u00ean m\u00e1y t\u00ednh \u0111\u00e3 c\u0169 ho\u1eb7c b\u1ecb l\u1ed7i.<\/li>\n<li>Modem\/Router b\u1ecb &#8220;treo&#8221; do ho\u1ea1t \u0111\u1ed9ng l\u00e2u ng\u00e0y.<\/li>\n<\/ul>\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n<ol>\n<li><strong>Ki\u1ec3m tra d\u00e2y m\u1ea1ng:<\/strong> R\u00fat d\u00e2y LAN ra c\u1eafm l\u1ea1i th\u1eadt ch\u1eb7t \u1edf c\u1ea3 hai \u0111\u1ea7u (t\u1eeb modem \u0111\u1ebfn router ho\u1eb7c t\u1eeb modem \u0111\u1ebfn m\u00e1y t\u00ednh). \u0110\u1ea3m b\u1ea3o \u0111\u00e8n t\u00edn hi\u1ec7u \u1edf c\u1ed5ng LAN s\u00e1ng.<\/li>\n<li><strong>Kh\u1edfi \u0111\u1ed9ng l\u1ea1i thi\u1ebft b\u1ecb:<\/strong> T\u1eaft ngu\u1ed3n c\u1ea3 modem v\u00e0 router. \u0110\u1ee3i kho\u1ea3ng 1-2 ph\u00fat r\u1ed3i b\u1eadt l\u1ea1i modem tr\u01b0\u1edbc, \u0111\u1ee3i modem s\u00e1ng \u0111\u00e8n \u1ed5n \u0111\u1ecbnh r\u1ed3i m\u1edbi b\u1eadt router.<\/li>\n<li><strong>C\u1eadp nh\u1eadt Driver:<\/strong> N\u1ebfu b\u1ea1n k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp b\u1eb1ng m\u00e1y t\u00ednh, h\u00e3y v\u00e0o Device Manager \u0111\u1ec3 ki\u1ec3m tra v\u00e0 c\u1eadp nh\u1eadt driver cho card m\u1ea1ng.<\/li>\n<li><strong>Th\u1eed c\u1ed5ng LAN kh\u00e1c:<\/strong> C\u1eafm d\u00e2y m\u1ea1ng sang m\u1ed9t c\u1ed5ng LAN kh\u00e1c tr\u00ean modem\/router \u0111\u1ec3 lo\u1ea1i tr\u1eeb kh\u1ea3 n\u0103ng h\u1ecfng c\u1ed5ng.<\/li>\n<\/ol>\n<figure id=\"attachment_36008\" aria-describedby=\"caption-attachment-36008\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-36008\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loi-PPPoE-thuong-gap.png\" alt=\"C\u00e1c l\u1ed7i PPPoE th\u01b0\u1eddng g\u1eb7p\" width=\"800\" height=\"480\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loi-PPPoE-thuong-gap.png 1000w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loi-PPPoE-thuong-gap-300x180.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/11\/Cac-loi-PPPoE-thuong-gap-768x461.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36008\" class=\"wp-caption-text\">C\u00e1c l\u1ed7i PPPoE th\u01b0\u1eddng g\u1eb7p<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Loi-691-Truy-cap-bi-tu-choi-do-ten-nguoi-dung-hoac-mat-khau-khong-hop-le\"><\/span><strong>L\u1ed7i 691: Truy c\u1eadp b\u1ecb t\u1eeb ch\u1ed1i do t\u00ean ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c m\u1eadt kh\u1ea9u kh\u00f4ng h\u1ee3p l\u1ec7<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>L\u1ed7i n\u00e0y r\u1ea5t r\u00f5 r\u00e0ng, ch\u1ec9 ra v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf th\u00f4ng tin x\u00e1c th\u1ef1c c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>Nguy\u00ean nh\u00e2n:<\/strong><\/p>\n<ul>\n<li>B\u1ea1n \u0111\u00e3 nh\u1eadp sai username ho\u1eb7c password PPPoE.<\/li>\n<li>T\u00e0i kho\u1ea3n c\u1ee7a b\u1ea1n \u0111\u00e3 h\u1ebft h\u1ea1n h\u1ee3p \u0111\u1ed3ng ho\u1eb7c b\u1ecb nh\u00e0 m\u1ea1ng kh\u00f3a v\u00ec l\u00fd do n\u00e0o \u0111\u00f3 (v\u00ed d\u1ee5: ch\u01b0a thanh to\u00e1n c\u01b0\u1edbc).<\/li>\n<li>Phi\u00ean k\u1ebft n\u1ed1i c\u0169 c\u1ee7a b\u1ea1n ch\u01b0a k\u1ebft th\u00fac ho\u00e0n to\u00e0n (b\u1ecb treo), trong khi b\u1ea1n \u0111ang c\u1ed1 t\u1ea1o m\u1ed9t phi\u00ean m\u1edbi.<\/li>\n<\/ul>\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n<ol>\n<li><strong>Ki\u1ec3m tra l\u1ea1i th\u00f4ng tin:<\/strong> T\u00ecm l\u1ea1i h\u1ee3p \u0111\u1ed3ng ho\u1eb7c phi\u1ebfu th\u00f4ng tin nh\u00e0 m\u1ea1ng cung c\u1ea5p. Ki\u1ec3m tra k\u1ef9 t\u1eebng k\u00fd t\u1ef1 c\u1ee7a username v\u00e0 password, l\u01b0u \u00fd ch\u1eef hoa\/ch\u1eef th\u01b0\u1eddng.<\/li>\n<li><strong>Kh\u1edfi \u0111\u1ed9ng l\u1ea1i modem:<\/strong> T\u1eaft modem, \u0111\u1ee3i v\u00e0i ph\u00fat r\u1ed3i b\u1eadt l\u1ea1i. Thao t\u00e1c n\u00e0y gi\u00fap k\u1ebft th\u00fac phi\u00ean l\u00e0m vi\u1ec7c c\u0169 \u0111ang b\u1ecb treo tr\u00ean h\u1ec7 th\u1ed1ng c\u1ee7a nh\u00e0 m\u1ea1ng.<\/li>\n<li><strong>Li\u00ean h\u1ec7 t\u1ed5ng \u0111\u00e0i:<\/strong> N\u1ebfu \u0111\u00e3 th\u1eed c\u1ea3 hai c\u00e1ch tr\u00ean m\u00e0 v\u1eabn kh\u00f4ng \u0111\u01b0\u1ee3c, h\u00e3y g\u1ecdi ngay cho t\u1ed5ng \u0111\u00e0i ch\u0103m s\u00f3c kh\u00e1ch h\u00e0ng c\u1ee7a nh\u00e0 m\u1ea1ng (Viettel, FPT, VNPT). H\u1ecd s\u1ebd ki\u1ec3m tra t\u00ecnh tr\u1ea1ng t\u00e0i kho\u1ea3n c\u1ee7a b\u1ea1n v\u00e0 cung c\u1ea5p l\u1ea1i th\u00f4ng tin ch\u00ednh x\u00e1c.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Loi-router-khong-ket-noi-duoc-PPPoE\"><\/span><strong>L\u1ed7i router kh\u00f4ng k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c PPPoE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Router b\u00e1o \u0111\u00e8n Internet m\u00e0u \u0111\u1ecf ho\u1eb7c cam v\u00e0 b\u1ea1n kh\u00f4ng th\u1ec3 truy c\u1eadp web.<\/p>\n<p><strong>Nguy\u00ean nh\u00e2n:<\/strong><\/p>\n<ul>\n<li>C\u1ea5u h\u00ecnh PPPoE tr\u00ean router b\u1ecb sai (sai th\u00f4ng tin, sai ki\u1ec3u k\u1ebft n\u1ed1i).<\/li>\n<li>Router b\u1ecb treo ho\u1eb7c l\u1ed7i ph\u1ea7n m\u1ec1m.<\/li>\n<li>C\u00f3 s\u1ef1 c\u1ed1 t\u1eeb ph\u00eda nh\u00e0 m\u1ea1ng.<\/li>\n<\/ul>\n<p><strong>C\u00e1ch kh\u1eafc ph\u1ee5c:<\/strong><\/p>\n<ol>\n<li><strong>\u0110\u0103ng nh\u1eadp v\u00e0 ki\u1ec3m tra c\u1ea5u h\u00ecnh:<\/strong> Truy c\u1eadp v\u00e0o trang qu\u1ea3n tr\u1ecb c\u1ee7a router (th\u01b0\u1eddng l\u00e0 192.168.1.1 ho\u1eb7c 192.168.0.1), t\u00ecm \u0111\u1ebfn m\u1ee5c WAN\/Internet v\u00e0 ki\u1ec3m tra l\u1ea1i xem b\u1ea1n \u0111\u00e3 ch\u1ecdn \u0111\u00fang ki\u1ec3u k\u1ebft n\u1ed1i l\u00e0 PPPoE v\u00e0 nh\u1eadp ch\u00ednh x\u00e1c t\u00e0i kho\u1ea3n hay ch\u01b0a.<\/li>\n<li><strong>Reset router:<\/strong> \u0110\u00e2y l\u00e0 gi\u1ea3i ph\u00e1p cu\u1ed1i c\u00f9ng n\u1ebfu c\u00e1c c\u00e1ch tr\u00ean kh\u00f4ng hi\u1ec7u qu\u1ea3. D\u00f9ng m\u1ed9t que t\u0103m nh\u1ea5n gi\u1eef n\u00fat reset nh\u1ecf \u1edf ph\u00eda sau router trong kho\u1ea3ng 10-15 gi\u00e2y. Sau khi reset, b\u1ea1n s\u1ebd ph\u1ea3i c\u00e0i \u0111\u1eb7t l\u1ea1i router t\u1eeb \u0111\u1ea7u.<\/li>\n<li><strong>Ki\u1ec3m tra t\u00edn hi\u1ec7u nh\u00e0 m\u1ea1ng:<\/strong> H\u00e3y th\u1eed k\u1ebft n\u1ed1i d\u00e2y m\u1ea1ng tr\u1ef1c ti\u1ebfp t\u1eeb modem c\u1ee7a nh\u00e0 m\u1ea1ng v\u00e0o m\u00e1y t\u00ednh v\u00e0 th\u1ef1c hi\u1ec7n quay s\u1ed1 PPPoE tr\u00ean m\u00e1y t\u00ednh. N\u1ebfu v\u1eabn kh\u00f4ng \u0111\u01b0\u1ee3c th\u00ec kh\u1ea3 n\u0103ng cao l\u00e0 l\u1ed7i t\u1eeb \u0111\u01b0\u1eddng truy\u1ec1n c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Cau-hoi-thuong-gap-ve-PPPoE-FAQ\"><\/span><strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 PPPoE (FAQ)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>L\u00e0m sao \u0111\u1ec3 l\u1ea5y l\u1ea1i t\u00e0i kho\u1ea3n PPPoE khi b\u1ecb m\u1ea5t?<\/strong><\/p>\n<p>C\u00e1ch nhanh nh\u1ea5t v\u00e0 duy nh\u1ea5t l\u00e0 g\u1ecdi \u0111i\u1ec7n \u0111\u1ebfn t\u1ed5ng \u0111\u00e0i ch\u0103m s\u00f3c kh\u00e1ch h\u00e0ng c\u1ee7a nh\u00e0 m\u1ea1ng b\u1ea1n \u0111ang s\u1eed d\u1ee5ng (Viettel, FPT, VNPT,&#8230;). Cung c\u1ea5p th\u00f4ng tin ch\u1ee7 h\u1ee3p \u0111\u1ed3ng (t\u00ean, s\u1ed1 CMND\/CCCD) v\u00e0 h\u1ecd s\u1ebd c\u1ea5p l\u1ea1i cho b\u1ea1n.<\/p>\n<p><strong>C\u00f3 th\u1ec3 d\u00f9ng 1 t\u00e0i kho\u1ea3n PPPoE cho 2 router kh\u00e1c nhau kh\u00f4ng?<\/strong><\/p>\n<p>Kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ed3ng th\u1eddi. M\u1ed7i t\u00e0i kho\u1ea3n PPPoE ch\u1ec9 cho ph\u00e9p t\u1ea1o m\u1ed9t phi\u00ean k\u1ebft n\u1ed1i t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m. N\u1ebfu b\u1ea1n c\u1eafm router th\u1ee9 hai v\u00e0 quay s\u1ed1 v\u1edbi c\u00f9ng m\u1ed9t t\u00e0i kho\u1ea3n, k\u1ebft n\u1ed1i \u1edf router \u0111\u1ea7u ti\u00ean s\u1ebd b\u1ecb ng\u1eaft.<\/p>\n<p><strong>Nh\u00e0 m\u1ea1ng FPT, Viettel, VNPT c\u00f3 d\u00f9ng PPPoE kh\u00f4ng?<\/strong><\/p>\n<p>C\u00f3. \u0110\u00e2y l\u00e0 ba nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam v\u00e0 t\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111ang s\u1eed d\u1ee5ng giao th\u1ee9c PPPoE l\u00e0m ph\u01b0\u01a1ng th\u1ee9c x\u00e1c th\u1ef1c ch\u00ednh cho c\u00e1c g\u00f3i c\u01b0\u1edbc Internet c\u00e1 nh\u00e2n v\u00e0 h\u1ed9 gia \u0111\u00ecnh.<\/p>\n<p>Giao th\u1ee9c PPPoE \u0111\u00f3ng m\u1ed9t vai tr\u00f2 thi\u1ebft y\u1ebfu trong vi\u1ec7c cung c\u1ea5p k\u1ebft n\u1ed1i Internet b\u0103ng th\u00f4ng r\u1ed9ng \u0111\u1ebfn h\u00e0ng tri\u1ec7u h\u1ed9 gia \u0111\u00ecnh t\u1ea1i Vi\u1ec7t Nam. M\u1eb7c d\u00f9 nghe c\u00f3 v\u1ebb k\u1ef9 thu\u1eadt, nh\u01b0ng vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c <strong>PPPoE l\u00e0 g\u00ec<\/strong>, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1ch x\u1eed l\u00fd c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan s\u1ebd gi\u00fap b\u1ea1n ch\u1ee7 \u0111\u1ed9ng h\u01a1n r\u1ea5t nhi\u1ec1u trong vi\u1ec7c s\u1eed d\u1ee5ng v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng Internet c\u1ee7a m\u00ecnh.<\/p>\n<p>Hy v\u1ecdng r\u1eb1ng qua b\u00e0i vi\u1ebft chi ti\u1ebft n\u00e0y c\u1ee7a InterData, b\u1ea1n \u0111\u00e3 c\u00f3 \u0111\u1ee7 th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ef1 tin c\u1ea5u h\u00ecnh router v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i \u0111\u01a1n gi\u1ea3n m\u00e0 kh\u00f4ng c\u1ea7n ch\u1edd \u0111\u1ee3i s\u1ef1 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u1ea5t m\u1ea1ng \u0111\u1ed9t ng\u1ed9t v\u00e0 kh\u00f4ng hi\u1ec3u PPPoE l\u00e0 g\u00ec khi \u0111\u01b0\u1ee3c k\u1ef9 thu\u1eadt vi\u00ean nh\u1eafc \u0111\u1ebfn? B\u1ea1n kh\u00f4ng h\u1ec1 \u0111\u01a1n \u0111\u1ed9c. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u1ea3m th\u1ea5y b\u1ed1i r\u1ed1i v\u1edbi thu\u1eadt ng\u1eef n\u00e0y. B\u00e0i vi\u1ebft n\u00e0y c\u1ee7a InterData s\u1ebd gi\u1ea3i th\u00edch t\u1ea5t t\u1ea7n t\u1eadt v\u1ec1 giao th\u1ee9c PPPoE m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t, t\u1eeb<\/p>\n","protected":false},"author":11,"featured_media":36009,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-36003","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\/36003","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=36003"}],"version-history":[{"count":5,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36003\/revisions"}],"predecessor-version":[{"id":36027,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36003\/revisions\/36027"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/36009"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=36003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=36003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=36003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}