{"id":479548,"date":"2023-08-09T10:41:56","date_gmt":"2023-08-09T10:41:56","guid":{"rendered":""},"modified":"2023-09-05T11:19:05","modified_gmt":"2023-09-05T11:19:05","slug":"vlan-tagging","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/vlan-tagging\/","title":{"rendered":"G\u1eafn th\u1ebb Vlan"},"content":{"rendered":"<p>Th\u00f4ng tin t\u00f3m t\u1eaft v\u1ec1 g\u1eafn th\u1ebb VLAN<\/p>\n<p>G\u1eafn th\u1ebb M\u1ea1ng c\u1ee5c b\u1ed9 \u1ea3o (VLAN) l\u00e0 giao th\u1ee9c cho ph\u00e9p nhi\u1ec1u Vlan chia s\u1ebb c\u00f9ng m\u1ed9t m\u1ea1ng v\u1eadt l\u00fd. N\u00f3 ch\u00e8n th\u00f4ng tin b\u1ed5 sung trong khung Ethernet \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh khung \u0111\u00f3 thu\u1ed9c v\u1ec1 VLAN n\u00e0o. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng ph\u00e2n \u0111o\u1ea1n m\u1ea1ng, n\u00e2ng cao hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c g\u1eafn th\u1ebb Vlan v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>G\u1eafn th\u1ebb Vlan l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong ti\u00eau chu\u1ea9n IEEE 802.1Q v\u00e0o n\u0103m 1998. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a vi\u1ec7c g\u1eafn th\u1ebb Vlan xu\u1ea5t ph\u00e1t t\u1eeb nhu c\u1ea7u c\u00e1ch ly l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng trong m\u1ed9t m\u1ea1ng v\u1eadt l\u00fd duy nh\u1ea5t. S\u1ef1 c\u00f4 l\u1eadp n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt v\u00e0 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n l\u00fd m\u1ea1ng. Ti\u00eau chu\u1ea9n IEEE 802.1Q \u0111\u00e3 thi\u1ebft l\u1eadp m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn ph\u1ed5 qu\u00e1t \u0111\u1ec3 tri\u1ec3n khai Vlan tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb, nh\u00e0 cung c\u1ea5p v\u00e0 n\u1ec1n t\u1ea3ng kh\u00e1c nhau.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 g\u1eafn th\u1ebb Vlan: M\u1edf r\u1ed9ng g\u1eafn th\u1ebb Vlan ch\u1ee7 \u0111\u1ec1<\/h2>\n<p>G\u1eafn th\u1ebb Vlan \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong ki\u1ebfn tr\u00fac m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. B\u1eb1ng c\u00e1ch g\u1eafn th\u1ebb c\u00e1c g\u00f3i d\u1eef li\u1ec7u v\u1edbi th\u00f4ng tin VLAN c\u1ee5 th\u1ec3, c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c g\u00f3i th\u00f4ng minh h\u01a1n. S\u1ef1 ph\u00e2n t\u00e1ch n\u00e0y th\u00e0nh c\u00e1c Vlan kh\u00e1c nhau gi\u00fap:<\/p>\n<ul>\n<li><strong>B\u1ea3o m\u1eadt n\u00e2ng cao<\/strong>: C\u00f4 l\u1eadp l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o th\u00f4ng tin nh\u1ea1y c\u1ea3m.<\/li>\n<li><strong>Hi\u1ec7u qu\u1ea3 m\u1ea1ng t\u1ed1t h\u01a1n<\/strong>: Ph\u00e2n \u0111o\u1ea1n m\u1ea1ng c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba t\u1eafc ngh\u1ebdn, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t m\u1ea1ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/li>\n<li><strong>D\u1ec5 qu\u1ea3n l\u00fd<\/strong>: Vi\u1ec7c nh\u00f3m c\u00e1c thi\u1ebft b\u1ecb li\u00ean quan v\u00e0o VLAN gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c qu\u1ea3n tr\u1ecb.<\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a vi\u1ec7c g\u1eafn th\u1ebb Vlan: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a vi\u1ec7c g\u1eafn th\u1ebb Vlan<\/h2>\n<p>G\u1eafn th\u1ebb Vlan th\u00eam th\u00f4ng tin v\u00e0o khung Ethernet b\u1eb1ng ti\u00eau \u0111\u1ec1 Vlan \u0111\u1eb7c bi\u1ec7t. Ti\u00eau \u0111\u1ec1 n\u00e0y ch\u1ee9a:<\/p>\n<ul>\n<li><strong>M\u00e3 \u0111\u1ecbnh danh giao th\u1ee9c th\u1ebb (TPID)<\/strong>: Gi\u00e1 tr\u1ecb n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh 0x8100, x\u00e1c \u0111\u1ecbnh khung l\u00e0 khung \u0111\u01b0\u1ee3c g\u1eafn th\u1ebb Vlan.<\/li>\n<li><strong>\u0110i\u1ec3m m\u00e3 \u01b0u ti\u00ean (PCP)<\/strong>: \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 \u01b0u ti\u00ean c\u1ee7a khung.<\/li>\n<li><strong>M\u00e3 \u0111\u1ecbnh d\u1ea1ng chu\u1ea9n (CFI)<\/strong>: Cho bi\u1ebft \u0111\u1ecbnh d\u1ea1ng c\u1ee7a khung \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i.<\/li>\n<li><strong>M\u00e3 \u0111\u1ecbnh danh Vlan (VID)<\/strong>: Ch\u1ec9 \u0111\u1ecbnh VLAN m\u00e0 khung thu\u1ed9c v\u1ec1.<\/li>\n<\/ul>\n<p>Switch s\u1eed d\u1ee5ng th\u00f4ng tin n\u00e0y \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn khung m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c trong m\u1ea1ng.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a g\u1eafn th\u1ebb Vlan<\/h2>\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a g\u1eafn th\u1ebb Vlan bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Uy\u1ec3n chuy\u1ec3n<\/strong>: Cho ph\u00e9p t\u1ea1o m\u1ea1ng \u1ea3o trong c\u00f9ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng v\u1eadt l\u00fd.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong>: T\u1ea1o \u0111i\u1ec1u ki\u1ec7n t\u0103ng tr\u01b0\u1edfng b\u1eb1ng c\u00e1ch th\u00eam Vlan m\u1edbi m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i v\u1eadt l\u00fd.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c<\/strong>: Tu\u00e2n theo ti\u00eau chu\u1ea9n ng\u00e0nh, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i g\u1eafn th\u1ebb Vlan<\/h2>\n<p>C\u00e1c lo\u1ea1i k\u1ef9 thu\u1eadt g\u1eafn th\u1ebb Vlan kh\u00e1c nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, nh\u01b0 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong b\u1ea3ng b\u00ean d\u01b0\u1edbi:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eafn th\u1ebb<\/td>\n<td>C\u00e1c khung kh\u00f4ng c\u00f3 th\u1ebb VLAN.<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01b0\u1ee3c g\u1eafn th\u1ebb \u0111\u01a1n<\/td>\n<td>C\u00e1c khung c\u00f3 m\u1ed9t th\u1ebb Vlan.<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01b0\u1ee3c g\u1eafn th\u1ebb k\u00e9p<\/td>\n<td>C\u00e1c khung c\u00f3 hai th\u1ebb Vlan (g\u1eafn th\u1ebb Q-in-Q).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng g\u1eafn th\u1ebb Vlan, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>G\u1eafn th\u1ebb Vlan \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n<ul>\n<li><strong>T\u1ea1o m\u1ea1ng \u1ea3o<\/strong>: Ph\u00e2n \u0111o\u1ea1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp cho c\u00e1c ph\u00f2ng ban kh\u00e1c nhau trong m\u1ed9t doanh nghi\u1ec7p.<\/li>\n<li><strong>T\u0103ng c\u01b0\u1eddng an ninh<\/strong>: T\u00e1ch bi\u1ec7t c\u00e1c th\u00f4ng tin nh\u1ea1y c\u1ea3m.<\/li>\n<\/ul>\n<p>C\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>C\u1ea5u h\u00ecnh sai<\/strong>: Gi\u1ea3i ph\u00e1p bao g\u1ed3m vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch v\u00e0 qu\u1ea3n l\u00fd ph\u00f9 h\u1ee3p.<\/li>\n<li><strong>Nh\u1eefng v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch<\/strong>: \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t ti\u00eau chu\u1ea9n.<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 nh\u1eefng so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>G\u1eafn th\u1ebb Vlan<\/th>\n<th>M\u1ea1ng LAN truy\u1ec1n th\u1ed1ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ph\u00e2n \u0111o\u1ea1n<\/td>\n<td>\u0110\u00fang<\/td>\n<td>KH\u00d4NG<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/td>\n<td>Cao<\/td>\n<td>Th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/td>\n<td>Cao<\/td>\n<td>Kh\u00e1c nhau<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn g\u1eafn th\u1ebb Vlan<\/h2>\n<p>V\u1edbi s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a c\u00f4ng ngh\u1ec7 m\u1ea1ng, vi\u1ec7c g\u1eafn th\u1ebb Vlan d\u1ef1 ki\u1ebfn s\u1ebd ph\u00e1t tri\u1ec3n trong:<\/p>\n<ul>\n<li><strong>T\u00edch h\u1ee3p v\u1edbi SDN<\/strong>: T\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 ki\u1ec3m so\u00e1t m\u1ea1nh m\u1ebd h\u01a1n tr\u00ean VLAN.<\/li>\n<li><strong>C\u00e1c bi\u1ec7n ph\u00e1p an ninh n\u00e2ng cao<\/strong>: Ph\u00e1t tri\u1ec3n c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt m\u1edbi cho qu\u1ea3n l\u00fd VLAN.<\/li>\n<\/ul>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi vi\u1ec7c g\u1eafn th\u1ebb Vlan<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng trong Vlan \u0111\u1ec3 c\u1ea3i thi\u1ec7n t\u00ednh b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u su\u1ea5t. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng g\u1eafn th\u1ebb Vlan, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp hi\u1ec7u qu\u1ea3, \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng tr\u00ean c\u00e1c Vlan kh\u00e1c nhau c\u00f3 th\u1ec3 truy c\u1eadp t\u00e0i nguy\u00ean h\u1ecd c\u1ea7n trong khi v\u1eabn duy tr\u00ec b\u1ea3o m\u1eadt.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.ieee.org\" target=\"_new\" rel=\"noopener nofollow\">Ti\u00eau chu\u1ea9n IEEE 802.1Q<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">D\u1ecbch v\u1ee5 OneProxy v\u00e0 t\u00edch h\u1ee3p Vlan<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn g\u1eafn th\u1ebb Vlan c\u1ee7a Cisco<\/a><\/li>\n<\/ul>\n<p>C\u00e1c t\u00e0i nguy\u00ean tr\u00ean cung c\u1ea5p chi ti\u1ebft to\u00e0n di\u1ec7n v\u1ec1 g\u1eafn th\u1ebb Vlan, c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 v\u00e0 s\u1ef1 t\u00edch h\u1ee3p c\u1ee7a n\u00f3 v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy.<\/p>","protected":false},"featured_media":479549,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479548","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>VLAN Tagging<\/mark>","faq_items":[{"question":"What is VLAN tagging, and why is it important?","answer":"<p>VLAN tagging is a network protocol that allows multiple Virtual Local Area Networks (VLANs) to share the same physical network by inserting additional information within the Ethernet frame to identify the VLAN the frame belongs to. It is essential for enhancing network efficiency, security, and ease of management.<\/p>"},{"question":"What is the history of VLAN tagging?","answer":"<p>VLAN tagging was first introduced in the IEEE 802.1Q standard in 1998. It was developed to enable isolation of network traffic within a single physical network, leading to improved security and simplified network management.<\/p>"},{"question":"How does VLAN tagging work?","answer":"<p>VLAN tagging adds a special header to the Ethernet frame, containing information such as Tag Protocol Identifier (TPID), Priority Code Point (PCP), Canonical Format Identifier (CFI), and VLAN Identifier (VID). Network switches use this information to route the frame correctly within the network.<\/p>"},{"question":"What are the key features of VLAN tagging?","answer":"<p>The key features of VLAN tagging include flexibility in creating virtual networks within the same physical infrastructure, scalability to facilitate growth by adding new VLANs, and interoperability that ensures compatibility between different devices and platforms.<\/p>"},{"question":"What types of VLAN tagging exist?","answer":"<p>VLAN tagging includes Untagged, Single-Tagged, and Double-Tagged frames. Untagged frames have no VLAN tags, Single-Tagged frames include one VLAN tag, and Double-Tagged frames carry two VLAN tags, often referred to as Q-in-Q tagging.<\/p>"},{"question":"How is VLAN tagging used, and what are some common problems and solutions?","answer":"<p>VLAN tagging is used for creating virtual networks and enhancing security by segregating traffic. Common problems may include misconfiguration and compatibility issues, with solutions focusing on proper planning, management, and ensuring standard compliance.<\/p>"},{"question":"What are the perspectives and future technologies related to VLAN tagging?","answer":"<p>Future perspectives related to VLAN tagging include its integration with Software-Defined Networking (SDN) for more robust automation and control, and the development of enhanced security measures for VLAN management.<\/p>"},{"question":"How can proxy servers like OneProxy be associated with VLAN tagging?","answer":"<p>Proxy servers like OneProxy can work within VLANs to improve security and performance. By utilizing VLAN tagging, a proxy server can efficiently direct traffic, allowing users on different VLANs to access needed resources while maintaining security.<\/p>"},{"question":"Where can I find more information about VLAN tagging?","answer":"<p>You can find more detailed information about VLAN tagging through resources like the <a href=\"https:\/\/www.ieee.org\" target=\"_new\">IEEE 802.1Q Standard<\/a>, <a href=\"https:\/\/www.oneproxy.pro\" target=\"_new\">OneProxy Services and VLAN Integration<\/a>, and <a href=\"https:\/\/www.cisco.com\" target=\"_new\">Cisco's VLAN Tagging Guide<\/a>.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479548\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479549"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}