{"id":1566,"date":"2017-04-01T22:46:05","date_gmt":"2017-04-01T15:46:05","guid":{"rendered":"https:\/\/engisv.info\/?p=1566"},"modified":"2017-04-01T22:46:05","modified_gmt":"2017-04-01T15:46:05","slug":"y-nghia-cua-cac-thong-tin-cau-hinh-ip","status":"publish","type":"post","link":"https:\/\/www.engisv.info\/?p=1566","title":{"rendered":"\u00dd ngh\u0129a c\u1ee7a c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh IP"},"content":{"rendered":"<p>Trong c\u00e1c b\u00e0i tr\u01b0\u1edbc ta \u0111\u00e3 l\u00e0m quen v\u1edbi vi\u1ec7c c\u1ea5u h\u00ecnh \u0111\u1ecba ch\u1ec9 IP t\u0129nh tr\u00ean <a href=\"https:\/\/www.engisv.info\/?p=217\" target=\"_blank\">CentOS<\/a> v\u00e0 <a href=\"https:\/\/www.engisv.info\/?p=1567\" target=\"_blank\">Windows<\/a>, v\u1eady c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh nh\u01b0 IP address, Subnet mask, Default Gateway v\u00e0 DNS server c\u00f3 \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o? Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng nhau \u0111i t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh n\u00e0y.<\/p>\n<p>\u0110\u1ec3 b\u1eaft \u0111\u1ea7u, ch\u00fang ta \u0111i ph\u00e2n t\u00edch m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng , vi\u1ec7c n\u00e0y cho ph\u00e9p ch\u00fang ta gi\u1ea3i th\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng h\u01a1n. \u1ede \u0111\u00e2y, ch\u00fang ta c\u00f3 m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng, Trong h\u1ec7 th\u1ed1ng LAN, ta d\u00f9ng c\u00e1c router \u0111\u1ec3 ph\u00e2n chia th\u00e0nh ba m\u1ea1ng Network 01 ch\u1ee9a c\u00e1c server cung c\u1ea5p d\u1ecbch v\u1ee5 cho m\u1ea1ng LAN, Network 02 v\u00e0 Network 03 l\u00e0 c\u00e1c m\u1ea1ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i (user) k\u1ebft n\u1ed1i c\u00e1c PC. Ch\u00fang ta m\u1eb7c \u0111\u1ecbnh r\u1eb1ng h\u1ec7 th\u1ed1ng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn (routing) ho\u00e0n ch\u1ec9nh, c\u00e1c m\u00e1y trong c\u00e1c m\u1ea1ng nh\u00ecn th\u1ea5y nhau v\u00e0 c\u00f3 th\u1ec3 \u0111i internet. Ta d\u00f9ng 3 m\u1ea1ng IP g\u00e1n cho Network 01, Network 02, Network 03 l\u1ea7n l\u01b0\u1ee3t nh\u01b0 sau:<\/p>\n<ul>\n<li>192.168.1.0\/24 c\u1ea5p IP cho Network 01, \u0111\u1ecba ch\u1ec9 IP \u0111\u1ea7u ti\u00ean 192.168.1.1 \u0111\u01b0\u1ee3c \u0111\u1eb7t cho GW 01 v\u00e0 internal DNS server l\u00e0 192.168.1.254.<\/li>\n<li>192.168.2.0\/24 c\u1ea5p IP cho Network 02, \u0111\u1ecba ch\u1ec9 IP \u0111\u1ea7u ti\u00ean 192.168.2.1 \u0111\u01b0\u1ee3c \u0111\u1eb7t cho GW 02, c\u00e1c \u0111\u1ecba ch\u1ec9 c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c c\u1ea5p cho PC.<\/li>\n<li>192.168.3.0\/24 c\u1ea5p IP cho Network 03, \u0111\u1ecba ch\u1ec9 IP \u0111\u1ea7u ti\u00ean 192.168.3.1 \u0111\u01b0\u1ee3c \u0111\u1eb7t cho GW 03, c\u00e1c \u0111\u1ecba ch\u1ec9 c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c c\u1ea5p cho PC.<\/li>\n<\/ul>\n<p>V\u1edbi GW 01, GW 02, GW 03 l\u1ea7n l\u01b0\u1ee3t l\u00e0 c\u00e1c interface b\u00ean trong c\u1ee7a c\u00e1c router d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i \u0111\u1ebfn c\u00e1c switch trong Network 01, Network 02 v\u00e0 Network 03. C\u00e1c interface n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 Gateway (l\u1ed1i ra) c\u1ee7a c\u00e1c m\u1ea1ng, cho ph\u00e9p th\u00f4ng tin ra v\u00e0o c\u00e1c m\u1ea1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1591 size-large aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2017\/04\/mohinh-1-1024x677.png\" alt=\"\" width=\"640\" height=\"423\" \/><\/p>\n<p>C\u00e1c th\u00f4ng tin \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh tr\u00ean card m\u1ea1ng c\u1ee7a thi\u1ebft b\u1ecb g\u1ed3m IP address, Subnet mask, Default Gateway v\u00e0 DNS server. Tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh c\u1ee7a m\u00e1y t\u00ednh c\u0169ng nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb tr\u00ean n\u1ec1n TCP\/IP \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00e1c th\u00f4ng tin n\u00e0y.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1598 \" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2017\/04\/cau-hinh-IP-5.png\" alt=\"\" width=\"468\" height=\"438\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u0110\u1ecba ch\u1ec9 IP (IP address):<\/strong><\/p>\n<p>Nh\u01b0 \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u trong b\u00e0i <a href=\"https:\/\/www.engisv.info\/?p=350\" target=\"_blank\">\u0111\u1ecba ch\u1ec9 IPv4<\/a>, trong m\u1ea1ng TCP\/IP, c\u00e1c m\u00e1y t\u00ednh ho\u1eb7c thi\u1ebft b\u1ecb s\u1ebd truy\u1ec1n th\u00f4ng v\u1edbi nhau th\u00f4ng qua \u0111\u1ecba ch\u1ec9 IP. \u0110\u1ecba ch\u1ec9 IP l\u00e0 \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t c\u1ee7a m\u1ed9t host trong m\u1ed9t m\u1ea1ng v\u00e0 c\u00e1c host kh\u00f4ng \u0111\u01b0\u1ee3c g\u00e1n tr\u00f9ng \u0111\u1ecba ch\u1ec9 IP v\u1edbi nhau. C\u00e1c m\u00e1y trong m\u1ed9t m\u1ea1ng mu\u1ed1n truy\u1ec1n th\u00f4ng v\u1edbi nhau ph\u1ea3i \u0111\u01b0\u1ee3c g\u00e1n IP c\u00f9ng m\u1ea1ng v\u1edbi nhau.<\/p>\n<p>Nh\u01b0 v\u1eady, theo m\u00f4 h\u00ecnh \u1edf tr\u00ean v\u00e0 c\u00e1c m\u1ea1ng \u0111\u01b0\u1ee3c ho\u1ea1ch \u0111\u1ecbnh trong k\u1ebf ho\u1ea1ch s\u1eed d\u1ee5ng th\u00ec c\u00e1c m\u00e1y t\u00ednh trong:<\/p>\n<ul>\n<li>Network 01 s\u1ebd \u0111\u01b0\u1ee3c\u00a0c\u1ea5p \u0111\u1ecba ch\u1ec9 t\u1eeb 192.168.1.2 \u0111\u1ebfn 192.168.1.253. Do \u0111\u1ecba ch\u1ec9 192.168.1.1 \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e1n cho <strong>GW 01<\/strong> v\u00e0 192.168.1.254 \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e1n cho <strong>local DNS server<\/strong> n\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p g\u00e1n cho c\u00e1c host kh\u00e1c.<\/li>\n<li>Network 02 s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p t\u1eeb 192.168.2.2 \u0111\u1ebfn 192.168.2.254 cho c\u00e1c host, do \u0111\u1ecba ch\u1ec9 192.168.2.1 \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e1n\u00a0cho <strong>GW 02<\/strong> n\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng n\u00f3 c\u1ea5p cho host kh\u00e1c.<\/li>\n<li>Network 03 s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p t\u1eeb 192.168.3.2 \u0111\u1ebfn 192.168.3.254 cho c\u00e1c host, do \u0111\u1ecba ch\u1ec9 192.168.2.1 \u0111\u00e3 \u0111\u01b0\u1ee3c g\u00e1n\u00a0cho <strong>GW 03<\/strong> n\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng n\u00f3 c\u1ea5p cho host kh\u00e1c.<\/li>\n<\/ul>\n<p><strong>Subnet mask:<\/strong><\/p>\n<p>Th\u00f4ng s\u1ed1<a href=\"https:\/\/www.engisv.info\/?p=1223\" target=\"_blank\">subnet mask<\/a> d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 IP c\u1ee7a host thu\u1ed9c m\u1ea1ng n\u00e0o b\u1eb1ng c\u00e1ch d\u00f9ng ph\u00e9p to\u00e1n AND c\u00e1c bit nh\u1ecb ph\u00e2n c\u1ee7a \u0111\u1ecba ch\u1ec9 IP v\u00e0 Subnet mask, c\u00e1c m\u00e1y t\u00ednh trong c\u00f9ng m\u1ed9t m\u1ea1ng IP th\u00ec s\u1ebd c\u00f3 subnet mask gi\u1ed1ng nhau.<\/p>\n<p>V\u1edbi default subnet, l\u1edbp A l\u00e0 255.0.0.0, l\u1edbp B l\u00e0 255.255.0.0, l\u1edbp C l\u00e0 255.255.255.0. \u00a0\u1ede v\u00ed d\u1ee5 c\u1ee7a m\u00f4 h\u00ecnh b\u00ean tr\u00ean, c\u00e1c m\u1ea1ng \u0111\u1ec1u thu\u1ed9c l\u1edbp C v\u1edbi default subnet mask l\u00e0 255.255.255.0.<\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p ch\u00fang ta c\u00f3 <a href=\"https:\/\/www.engisv.info\/?p=1392\" target=\"_blank\">ti\u1ebfn h\u00e0nh chia subnet<\/a>, th\u00ec subnet mask s\u1ebd thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb chia nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n<p><strong>Default gateway:<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a node m\u00e0 ph\u1ea3i th\u00f4ng qua \u0111\u00f3 c\u00e1c m\u00e1y trong m\u1ea1ng m\u1edbi c\u00f3 k\u1ec3 k\u1ebft n\u1ed1i qua c\u00e1c m\u1ea1ng kh\u00e1c ho\u1eb7c \u0111i intenet. Default gatway v\u00e0 IP c\u1ee7a host lu\u00f4n chung m\u1ed9t m\u1ea1ng \u0111\u1ecba ch\u1ec9 IP. \u1ede v\u00ed d\u1ee5 tr\u00ean ch\u00ednh l\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a <strong>GW 01<\/strong> c\u1ee7a <strong>Network 01<\/strong>, <strong>GW 02<\/strong> c\u1ee7a <strong>Network 02<\/strong>, <strong>GW 03<\/strong> c\u1ee7a <strong>Network 03<\/strong>, t\u01b0\u01a1ng \u1ee9ng nh\u01b0 sau:<\/p>\n<ul>\n<li>Network 01, c\u00e1c host b\u00ean trong s\u1ebd c\u00f3 default gateway \u00a0l\u00e0 192.168.1.1<\/li>\n<li>Network 02, c\u00e1c host b\u00ean trong s\u1ebd c\u00f3 default gateway \u00a0l\u00e0 192.168.2.1<\/li>\n<li>Network 03, c\u00e1c host b\u00ean trong s\u1ebd c\u00f3 default gateway \u00a0l\u00e0 192.168.3.1<\/li>\n<\/ul>\n<p>Vi\u1ec7c \u0111\u1ea7u ti\u00ean, khi ki\u1ec3m tra kh\u1ea3 n\u0103ng truy c\u1eadp ra c\u00e1c m\u1ea1ng ngo\u00e0i c\u1ee7a client, b\u1ea1n s\u1ebd ph\u1ea3i ki\u1ec3m tra th\u1eed n\u00f3 c\u00f3 \u0111i \u0111\u1ebfn \u0111\u01b0\u1ee3c Default Gateway hay kh\u00f4ng? N\u1ebfu kh\u00f4ng th\u1ec3 \u0111\u1ebfn \u0111\u01b0\u1ee3c Gateway th\u00ec ch\u1eafc ch\u1eafn client kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o ra \u0111\u01b0\u1ee3c c\u00e1c m\u1ea1ng b\u00ean ngo\u00e0i. N\u1ebfu Default gateway m\u00e0 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng th\u00ec m\u1ea1ng b\u00ean trong s\u1ebd ho\u00e0n to\u00e0n b\u1ecb c\u00f4 l\u1eadp.<\/p>\n<p><strong>DNS server:<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e2n gi\u1ea3i c\u00e1c \u0111\u1ecba ch\u1ec9 IP th\u00e0nh t\u00ean mi\u1ec1n, hostname ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i, hay ch\u00ednh l\u00e0 \u0111\u1ecba ch\u1ec9 c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 DNS.<\/p>\n<ul>\n<li>\u0110\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 DNS n\u00e0y c\u00f3 th\u1ec3 l\u00e0 c\u1ee7a c\u00e1c Internal DNS server, \u1edf \u0111\u00e2y, trong m\u00f4 h\u00ecnh tr\u00ean ta th\u1ea5y c\u00f3 m\u1ed9t local DNS server l\u00e0 192.168.1.254.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 DNS n\u00e0y c\u0169ng c\u00f3 th\u1ec3 l\u00e0 c\u00e1c DNS server \u0111\u01b0\u1ee3c public ngo\u00e0i internet, v\u00ed d\u1ee5 nh\u01b0 trong m\u00f4 h\u00ecnh ta th\u1ea5y l\u00e0 m\u00e1y ch\u1ee7 Google-public-dns v\u1edbi hai \u0111\u1ecba ch\u1ec9 IP l\u00e0 8.8.8.8 v\u00e0 8.8.4.4.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 DNS n\u00e0y c\u0169ng c\u00f3 th\u1ec3 l\u00e0 c\u00e1c DNS server c\u1ee7a c\u00e1c \u00a0nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u01b0\u1eddng truy\u1ec1n internet.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 DNS c\u0169ng c\u00f3 th\u1ec3 l\u00e0 \u0111\u1ecba ch\u1ec9 c\u1ee7a c\u00e1c <a href=\"https:\/\/www.engisv.info\/?p=294\" target=\"_blank\">forwarder DNS<\/a>, trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y ch\u00fang ta th\u1ea5y nhi\u1ec1u nh\u1ea5t l\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng IP c\u1ee7a modem\/router intenet, tr\u00ean modem\/router th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n t\u00ednh n\u0103ng forworder DNS.<\/li>\n<\/ul>\n<p>B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t m\u1ed9t ho\u1eb7c nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 DNS cho card m\u1ea1ng c\u1ee7a b\u1ea1n, theo <a href=\"https:\/\/www.engisv.info\/?p=162\" target=\"_blank\">c\u01a1 ch\u1ebf ph\u00e2n gi\u1ea3i DNS<\/a>, n\u1ebfu m\u00e1y ch\u1ee7 \u01b0u ti\u00ean \u0111\u1ea7u ti\u00ean m\u00e0 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng th\u00ec m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n s\u1ebd truy v\u1ea5n m\u1ea5y ch\u1ee7 th\u1ee9 2, v\u00e0 c\u1ee9 \u00a0nh\u01b0 th\u1ebf, n\u1ebfu m\u00e1y ch\u1ee7 th\u1ee9 2 c\u0169ng ch\u1ebft s\u1ebd truy c\u1eadp ti\u1ebfp theo xu\u1ed1ng m\u00e1y ch\u1ee7 th\u1ee9 3&#8230;<\/p>\n<p>V\u1eady, n\u1ebfu ta \u0111\u1eb7t DNS server l\u00e0 m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c public ngo\u00e0i internet, v\u00ed d\u1ee5 nh\u01b0 8.8.8.8, th\u00ec l\u00e0m sao client khi g\u00f5 v\u00e0o t\u00ean mi\u1ec1n m\u00e0 ch\u01b0a bi\u1ebft g\u00ec v\u1ec1 t\u00ean mi\u1ec1n \u0111\u00f3 m\u00e0 v\u1eabn c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o website mang t\u00ean mi\u1ec1n \u0111\u00f3? Khi ta nh\u1eadp v\u00e0o \u0111\u1ecba ch\u1ec9 website, th\u00ec \u0111\u1ea7u ti\u00ean m\u00e1y s\u1ebd \u0111\u00f3ng g\u00f3i tin truy c\u1eadp d\u1eef li\u1ec7u DNS v\u00e0 chuy\u1ec3n \u0111i b\u1eb1ng g\u00f3i tin IP v\u00e0 nh\u1edd Gateway chuy\u1ec3n g\u00f3i tin truy v\u1ea5n DNS \u0111\u00f3 \u0111\u1ebfn 8.8.8.8, Gateway s\u1ebd ti\u1ebfp t\u1ee5c g\u1edfi th\u00f4ng tin n\u00e0y \u0111\u1ebfn 8.8.8.8 th\u00f4ng qua c\u00e1c node c\u00f3 trong b\u1ea3ng \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a n\u00f3 ho\u1eb7c nh\u1edd \u0111\u1ebfn c\u00e1c router l\u00e2n c\u1eadn n\u00f3. Sau khi 8.8.8.8 tr\u1ea3 l\u1ea1i th\u00f4ng tin t\u00ean mi\u1ec1n v\u00e0 IP m\u00e1y ch\u1ee7 website cho m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n, th\u00ec m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n s\u1ebd li\u00ean h\u1ec7 \u0111\u1ebfn m\u00e1y ch\u1ee7 ch\u01b0a website \u0111\u1ec3 l\u1ea5y th\u00f4ng tin b\u1ea1n c\u1ea7n. C\u01a1 ch\u1ebf t\u01b0\u01a1ng t\u1ef1 cho internal DNS server ho\u1eb7c forwarder DNS. \u0110\u1ec3 hi\u1ec3u b\u1ea1n c\u00f3 th\u1ec3 xem th\u00eam ph\u1ea7n <a href=\"https:\/\/www.engisv.info\/?p=162\" target=\"_blank\">t\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf ph\u00e2n gi\u1ea3i DNS<\/a>.<\/p>\n<p>Sau khi xem to\u00e0n b\u1ed9 n\u1ed9i dung tr\u00ean, b\u1ea1n hay xem m\u00f4 h\u00ecnh b\u00ean d\u01b0\u1edbi \u0111\u00e2y v\u00e0 ph\u00e2n t\u00edch \u0111\u1ec3 hi\u1ec3u th\u00eam:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1603 aligncenter\" src=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2017\/04\/mohinh-2.png\" alt=\"\" width=\"670\" height=\"427\" \/><\/p>\n<p>M\u00f4 h\u00ecnh n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ea1ng \u1edf m\u1ed9t gia \u0111\u00ecnh, c\u00f3 k\u1ebft n\u1ed1i internet th\u00f4ng qua modem\/router.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong c\u00e1c b\u00e0i tr\u01b0\u1edbc ta \u0111\u00e3 l\u00e0m quen v\u1edbi vi\u1ec7c c\u1ea5u h\u00ecnh \u0111\u1ecba ch\u1ec9 IP t\u0129nh tr\u00ean CentOS v\u00e0 Windows, v\u1eady c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh nh\u01b0 IP address, Subnet mask, Default Gateway v\u00e0 DNS server c\u00f3 \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o? Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng nhau \u0111i t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh n\u00e0y. \u0110\u1ec3 b\u1eaft \u0111\u1ea7u, ch\u00fang ta \u0111i ph\u00e2n t\u00edch m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng , vi\u1ec7c n\u00e0y cho ph\u00e9p ch\u00fang ta gi\u1ea3i th\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng h\u01a1n. \u1ede \u0111\u00e2y,&hellip;<\/p>\n","protected":false},"author":2,"featured_media":1603,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"footnotes":""},"categories":[20,7],"tags":[72],"class_list":["post-1566","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cac-khai-niem","category-kien-thuc","tag-windows"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u00dd ngh\u0129a c\u1ee7a c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh IP - EngISV<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engisv.info\/?p=1566\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u00dd ngh\u0129a c\u1ee7a c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh IP - EngISV\" \/>\n<meta property=\"og:description\" content=\"Trong c\u00e1c b\u00e0i tr\u01b0\u1edbc ta \u0111\u00e3 l\u00e0m quen v\u1edbi vi\u1ec7c c\u1ea5u h\u00ecnh \u0111\u1ecba ch\u1ec9 IP t\u0129nh tr\u00ean CentOS v\u00e0 Windows, v\u1eady c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh nh\u01b0 IP address, Subnet mask, Default Gateway v\u00e0 DNS server c\u00f3 \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o? Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng nhau \u0111i t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh n\u00e0y. \u0110\u1ec3 b\u1eaft \u0111\u1ea7u, ch\u00fang ta \u0111i ph\u00e2n t\u00edch m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng , vi\u1ec7c n\u00e0y cho ph\u00e9p ch\u00fang ta gi\u1ea3i th\u00edch v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng h\u01a1n. \u1ede \u0111\u00e2y,&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.engisv.info\/?p=1566\" \/>\n<meta property=\"og:site_name\" content=\"EngISV\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/engisv\" \/>\n<meta property=\"article:published_time\" content=\"2017-04-01T15:46:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2017\/04\/mohinh-2-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"884\" \/>\n\t<meta property=\"og:image:height\" content=\"563\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"hoanghiepktv\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"hoanghiepktv\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566\"},\"author\":{\"name\":\"hoanghiepktv\",\"@id\":\"https:\\\/\\\/www.engisv.info\\\/#\\\/schema\\\/person\\\/dcbab2ddc35f4c71f45c7e13f36367bf\"},\"headline\":\"\u00dd ngh\u0129a c\u1ee7a c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh IP\",\"datePublished\":\"2017-04-01T15:46:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566\"},\"wordCount\":1753,\"publisher\":{\"@id\":\"https:\\\/\\\/www.engisv.info\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.engisv.info\\\/wp-content\\\/uploads\\\/2017\\\/04\\\/mohinh-2-1.png\",\"keywords\":[\"Windows\"],\"articleSection\":[\"C\u00e1c kh\u00e1i ni\u1ec7m\",\"Ki\u1ebfn th\u1ee9c\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566\",\"url\":\"https:\\\/\\\/www.engisv.info\\\/?p=1566\",\"name\":\"\u00dd ngh\u0129a c\u1ee7a c\u00e1c th\u00f4ng tin c\u1ea5u h\u00ecnh IP - 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