{"id":476656,"date":"2023-08-09T07:31:20","date_gmt":"2023-08-09T07:31:20","guid":{"rendered":""},"modified":"2023-09-05T11:13:11","modified_gmt":"2023-09-05T11:13:11","slug":"data-link-layer","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/data-link-layer\/","title":{"rendered":"L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u"},"content":{"rendered":"<p>L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u l\u00e0 l\u1edbp th\u1ee9 hai trong m\u00f4 h\u00ecnh K\u1ebft n\u1ed1i h\u1ec7 th\u1ed1ng m\u1edf (OSI). N\u00f3 x\u1eed l\u00fd vi\u1ec7c v\u1eadn chuy\u1ec3n c\u00e1c g\u00f3i d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady tr\u00ean c\u00e1c m\u1ea1ng v\u1eadt l\u00fd, qu\u1ea3n l\u00fd vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i c\u0169ng nh\u01b0 qu\u1ea3n l\u00fd vi\u1ec7c truy c\u1eadp m\u1ea1ng.<\/p>\n<h2>B\u1ed1i c\u1ea3nh l\u1ecbch s\u1eed c\u1ee7a L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>Kh\u00e1i ni\u1ec7m l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u b\u1eaft ngu\u1ed3n t\u1eeb s\u1ef1 ph\u00e1t tri\u1ec3n m\u00f4 h\u00ecnh OSI v\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1970 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 1980 c\u1ee7a T\u1ed5 ch\u1ee9c Ti\u00eau chu\u1ea9n h\u00f3a Qu\u1ed1c t\u1ebf (ISO). M\u00f4 h\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh nh\u1eb1m t\u1ea1o ra m\u1ed9t m\u00f4i tr\u01b0\u1eddng m\u1edf \u0111\u1ec3 ph\u00e1t tri\u1ec3n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb v\u00e0 ph\u1ea7n m\u1ec1m m\u1ea1ng. M\u00f4 h\u00ecnh OSI chia qu\u00e1 tr\u00ecnh giao ti\u1ebfp ph\u1ee9c t\u1ea1p gi\u1eefa m\u00e1y t\u00ednh v\u1edbi m\u00e1y t\u00ednh th\u00e0nh b\u1ea3y l\u1edbp c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c. L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u, l\u00e0 l\u1edbp th\u1ee9 hai, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3 gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb qua m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd.<\/p>\n<h2>\u0110i s\u00e2u h\u01a1n v\u00e0o L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u ph\u1ee5c v\u1ee5 m\u1ed9t s\u1ed1 ch\u1ee9c n\u0103ng quan tr\u1ecdng trong m\u00f4 h\u00ecnh OSI:<\/p>\n<ol>\n<li>\n<p><strong>\u0110\u1ed3ng b\u1ed9 h\u00f3a khung<\/strong>: N\u00f3 chia lu\u1ed3ng bit nh\u1eadn \u0111\u01b0\u1ee3c t\u1eeb l\u1edbp m\u1ea1ng th\u00e0nh c\u00e1c \u0111\u01a1n v\u1ecb d\u1eef li\u1ec7u c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 khung.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u1ecba ch\u1ec9 v\u1eadt l\u00fd<\/strong>: N\u1ebfu c\u00e1c khung \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau tr\u00ean m\u1ea1ng, l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u s\u1ebd th\u00eam ti\u00eau \u0111\u1ec1 v\u00e0o khung \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd c\u1ee7a m\u00e1y t\u00ednh \u0111\u00edch.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng<\/strong>: N\u1ebfu t\u1ed1c \u0111\u1ed9 l\u1ea5y d\u1eef li\u1ec7u c\u1ee7a ng\u01b0\u1eddi nh\u1eadn nh\u1ecf h\u01a1n t\u1ed1c \u0111\u1ed9 do ng\u01b0\u1eddi g\u1eedi t\u1ea1o ra th\u00ec l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u s\u1ebd \u00e1p \u0111\u1eb7t c\u01a1 ch\u1ebf ki\u1ec3m so\u00e1t lu\u1ed3ng \u0111\u1ec3 tr\u00e1nh l\u00e0m qu\u00e1 t\u1ea3i ng\u01b0\u1eddi nh\u1eadn.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t l\u1ed7i<\/strong>: N\u00f3 t\u0103ng th\u00eam \u0111\u1ed9 tin c\u1eady cho l\u1edbp v\u1eadt l\u00fd b\u1eb1ng c\u00e1ch th\u00eam c\u00e1c c\u01a1 ch\u1ebf \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 truy\u1ec1n l\u1ea1i c\u00e1c khung b\u1ecb h\u1ecfng ho\u1eb7c b\u1ecb m\u1ea5t. N\u00f3 c\u0169ng ng\u0103n ch\u1eb7n s\u1ef1 tr\u00f9ng l\u1eb7p c\u00e1c khung b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng x\u00e1c nh\u1eadn.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t truy c\u1eadp<\/strong>: Khi hai ho\u1eb7c nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00f9ng m\u1ed9t li\u00ean k\u1ebft, c\u00e1c giao th\u1ee9c li\u00ean k\u1ebft d\u1eef li\u1ec7u l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thi\u1ebft b\u1ecb n\u00e0o c\u00f3 quy\u1ec1n ki\u1ec3m so\u00e1t li\u00ean k\u1ebft t\u1ea1i b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chia th\u00e0nh hai l\u1edbp con \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3:<\/p>\n<ol>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t li\u00ean k\u1ebft logic (LLC)<\/strong>: L\u1edbp con ph\u00eda tr\u00ean n\u00e0y ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u1ed3ng b\u1ed9 h\u00f3a khung, ki\u1ec3m so\u00e1t lu\u1ed3ng v\u00e0 ki\u1ec3m tra l\u1ed7i.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t truy c\u1eadp ph\u01b0\u01a1ng ti\u1ec7n (MAC)<\/strong>: L\u1edbp con th\u1ea5p h\u01a1n, MAC, ch\u1ecbu tr\u00e1ch nhi\u1ec7m x\u1eed l\u00fd c\u00e1ch m\u1ed9t thi\u1ebft b\u1ecb tr\u00ean m\u1ea1ng c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u v\u00e0 quy\u1ec1n truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00f3.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<ul>\n<li>\n<p><strong>\u0111\u00f3ng khung<\/strong>: \u0110\u00f3ng khung l\u00e0 qu\u00e1 tr\u00ecnh t\u1ea1o khung t\u1eeb c\u00e1c datagram ho\u1eb7c g\u00f3i tin c\u1ee7a l\u1edbp m\u1ea1ng. Nh\u1eefng khung n\u00e0y \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn l\u1edbp v\u1eadt l\u00fd \u0111\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n ti\u1ebfp.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u1ecba ch\u1ec9 v\u1eadt l\u00fd<\/strong>: N\u00f3 cung c\u1ea5p nh\u1eadn d\u1ea1ng duy nh\u1ea5t cho t\u1eebng thi\u1ebft b\u1ecb tr\u00ean m\u1ea1ng.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t l\u1ed7i v\u00e0 lu\u1ed3ng<\/strong>: N\u00f3 \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n\/s\u1eeda l\u1ed7i v\u00e0 ki\u1ec3m so\u00e1t lu\u1ed3ng.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t truy c\u1eadp<\/strong>: X\u00e1c \u0111\u1ecbnh c\u00e1c quy t\u1eafc truy\u1ec1n thi\u1ebft b\u1ecb.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>C\u00e1c giao th\u1ee9c l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean lo\u1ea1i m\u1ea1ng m\u00e0 ch\u00fang ho\u1ea1t \u0111\u1ed9ng:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i m\u1ea1ng<\/th>\n<th>Giao th\u1ee9c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ea1ng c\u1ee5c b\u1ed9 (LAN)<\/td>\n<td>Ethernet, v\u00f2ng m\u00e3 th\u00f4ng b\u00e1o<\/td>\n<\/tr>\n<tr>\n<td>M\u1ea1ng khu v\u1ef1c \u0111\u00f4 th\u1ecb (MAN)<\/td>\n<td>Xe bu\u00fdt x\u1ebfp h\u00e0ng \u0111\u1ee3i ph\u00e2n t\u00e1n (DQDB)<\/td>\n<\/tr>\n<tr>\n<td>M\u1ea1ng di\u1ec7n r\u1ed9ng (WAN)<\/td>\n<td>Giao th\u1ee9c \u0111i\u1ec3m-\u0111i\u1ec3m (PPP), Ki\u1ec3m so\u00e1t li\u00ean k\u1ebft d\u1eef li\u1ec7u c\u1ea5p cao (HDLC)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vi\u1ec7c s\u1eed d\u1ee5ng L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1\/gi\u1ea3i ph\u00e1p li\u00ean quan<\/h2>\n<p>L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u t\u1ea1o th\u00e0nh x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng. N\u00f3 li\u00ean quan \u0111\u1ebfn m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng nh\u01b0 m\u1ea1ng LAN v\u00e0 WAN, nh\u1eadn d\u1ea1ng thi\u1ebft b\u1ecb m\u1ea1ng v\u00e0 thi\u1ebft l\u1eadp k\u00eanh li\u00ean l\u1ea1c \u0111\u00e1ng tin c\u1eady. Tuy nhi\u00ean, n\u00f3 c\u0169ng g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 xung \u0111\u1ed9t, h\u1ecfng d\u1eef li\u1ec7u v\u00e0 t\u1eafc ngh\u1ebdn. Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft th\u00f4ng qua c\u00e1c thu\u1eadt to\u00e1n ph\u00e1t hi\u1ec7n xung \u0111\u1ed9t, m\u00e3 ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i c\u0169ng nh\u01b0 c\u01a1 ch\u1ebf ki\u1ec3m so\u00e1t lu\u1ed3ng t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<h2>Ph\u00e2n t\u00edch so s\u00e1nh c\u1ee7a l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y th\u1ec3 hi\u1ec7n s\u1ef1 so s\u00e1nh gi\u1eefa l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u v\u00e0 c\u00e1c l\u1edbp li\u1ec1n k\u1ec1:<\/p>\n<table>\n<thead>\n<tr>\n<th>L\u1edbp OSI<\/th>\n<th>Ch\u1ee9c n\u0103ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>L\u1edbp v\u1eadt l\u00fd<\/strong><\/td>\n<td>Truy\u1ec1n d\u00f2ng bit th\u00f4 qua m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd<\/td>\n<\/tr>\n<tr>\n<td><strong>L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/strong><\/td>\n<td>\u0110\u00f3ng khung c\u00e1c g\u00f3i d\u1eef li\u1ec7u, th\u1ef1c hi\u1ec7n ki\u1ec3m so\u00e1t l\u1ed7i v\u00e0 qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp v\u00e0o ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd<\/td>\n<\/tr>\n<tr>\n<td><strong>L\u1edbp m\u1ea1ng<\/strong><\/td>\n<td>X\u1eed l\u00fd \u0111\u1ecbnh tuy\u1ebfn v\u00e0 chuy\u1ec3n ti\u1ebfp g\u00f3i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 m\u1ea1ng ph\u00e1t tri\u1ec3n, l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u s\u1ebd ti\u1ebfp t\u1ee5c th\u00edch \u1ee9ng v\u00e0 t\u00edch h\u1ee3p c\u00e1c k\u1ef9 thu\u1eadt m\u1edbi \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1t h\u01a1n. C\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 m\u1ea1ng l\u01b0\u1ee3ng t\u1eed v\u00e0 m\u1ea1ng 5G ho\u1eb7c 6G s\u1ebd y\u00eau c\u1ea7u c\u00e1c giao th\u1ee9c l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u1ec3 x\u1eed l\u00fd t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n, \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n v\u00e0 dung l\u01b0\u1ee3ng m\u1ea1ng t\u0103ng l\u00ean.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, \u0111\u00f3ng vai tr\u00f2 trung gian cho c\u00e1c y\u00eau c\u1ea7u t\u1eeb kh\u00e1ch h\u00e0ng \u0111ang t\u00ecm ki\u1ebfm t\u00e0i nguy\u00ean t\u1eeb c\u00e1c m\u00e1y ch\u1ee7 kh\u00e1c, ho\u1ea1t \u0111\u1ed9ng \u1edf l\u1edbp \u1ee9ng d\u1ee5ng c\u1ee7a m\u00f4 h\u00ecnh OSI. Tuy nhi\u00ean, l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u v\u1eabn \u0111\u00f3ng vai tr\u00f2 v\u00ec d\u1eef li\u1ec7u ph\u1ea3i di chuy\u1ec3n qua l\u1edbp n\u00e0y \u0111\u1ec3 \u0111\u1ebfn \u0111\u00edch. C\u00e1c m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u01a1 ch\u1ebf ki\u1ec3m so\u00e1t lu\u1ed3ng v\u00e0 l\u1ed7i c\u1ee7a l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ol>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/solutions\/collateral\/enterprise\/design-zone-smart-business-architecture\/sbaENP_whitepaper.html\" target=\"_new\" rel=\"noopener nofollow\">Cisco \u2013 L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/www.ibm.com\/docs\/en\/zos\/2.3.0?topic=layers-data-link-layer\" target=\"_new\" rel=\"noopener nofollow\">Trung t\u00e2m Ki\u1ebfn th\u1ee9c IBM \u2013 L\u1edbp Li\u00ean k\u1ebft D\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/www.csunplugged.org\/en\/topics\/computer-science-basics\/csunplugged\/whole-class-guided\/guide\/data-link-layer\/\" target=\"_new\" rel=\"noopener nofollow\">Khoa h\u1ecdc m\u00e1y t\u00ednh \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng - L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/docs.microsoft.com\/en-us\/previous-versions\/windows\/it-pro\/windows-2000-server\/cc977218(v=technet.10)\" target=\"_new\" rel=\"noopener nofollow\">Microsoft \u2013 L\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u<\/a><\/li>\n<\/ol>","protected":false},"featured_media":476657,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476656","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Link Layer: An In-Depth Examination<\/mark>","faq_items":[{"question":"What is the Data Link Layer?","answer":"<p>The Data Link Layer is the second layer in the Open Systems Interconnection (OSI) model. It is responsible for the reliable transportation of data packets across physical networks, handling error detection and correction, and governing network access.<\/p>"},{"question":"What are the primary functions of the Data Link Layer?","answer":"<p>The primary functions of the Data Link Layer include frame synchronization, physical addressing, flow control, error control, and access control.<\/p>"},{"question":"How does the Data Link Layer ensure reliable data transmission?","answer":"<p>The Data Link Layer ensures reliable data transmission by implementing error detection and correction techniques. If any error is detected, the layer triggers a retransmission of the corrupted data.<\/p>"},{"question":"What are the sublayers of the Data Link Layer?","answer":"<p>The Data Link Layer is divided into two sublayers - the Logical Link Control (LLC) that handles frame synchronization, flow control, and error checking, and the Media Access Control (MAC) that manages how a device on the network gains access to the data and permission to transmit it.<\/p>"},{"question":"What types of Data Link Layer protocols exist?","answer":"<p>Data Link Layer protocols vary based on the type of network. For instance, Ethernet and Token Ring are used in Local Area Networks (LAN), Distributed Queue Dual Bus (DQDB) in Metropolitan Area Networks (MAN), and Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC) in Wide Area Networks (WAN).<\/p>"},{"question":"How does the Data Link Layer interact with proxy servers?","answer":"<p>While proxy servers operate at the application layer of the OSI model, the Data Link Layer still plays a role in ensuring the data travels correctly from the source to the destination. This is done using the layer's error and flow control mechanisms.<\/p>"},{"question":"How will future technologies impact the Data Link Layer?","answer":"<p>As technology evolves and new concepts like quantum networking and advanced generation networks (5G, 6G) are introduced, the Data Link Layer will adapt to integrate new techniques for efficient data transmission, handle higher data rates, lower latency, and increased network capacities.<\/p>"},{"question":"What are some related resources for more information about the Data Link Layer?","answer":"<p>You can refer to resources like Cisco - Data Link Layer, IBM Knowledge Center - Data Link Layer, Computer Science Unleashed - Data Link Layer, and Microsoft - Data Link Layer for additional information.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476656","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\/476656\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476657"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}