{"id":476872,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:36","modified_gmt":"2023-09-05T11:13:36","slug":"dns","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns\/","title":{"rendered":"DNS"},"content":{"rendered":"<p>H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS) l\u00e0 th\u00e0nh ph\u1ea7n n\u1ec1n t\u1ea3ng c\u1ee7a Internet, \u0111\u00f3ng vai tr\u00f2 l\u00e0 danh b\u1ea1 c\u1ee7a World Wide Web. DNS d\u1ecbch t\u00ean trang web th\u00e2n thi\u1ec7n v\u1edbi con ng\u01b0\u1eddi nh\u01b0 \u201c<a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">www.oneproxy.pro<\/a>\u201d v\u00e0o \u0111\u1ecba ch\u1ec9 IP d\u1ea1ng s\u1ed1 m\u00e0 c\u00e1c m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi nhau.<\/p>\n<h2>S\u1ef1 ra \u0111\u1eddi v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a DNS<\/h2>\n<p>Kh\u00e1i ni\u1ec7m h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n ra \u0111\u1eddi t\u1eeb nhu c\u1ea7u v\u1ec1 s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3 khi internet b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng v\u00e0o cu\u1ed1i th\u1ebf k\u1ef7 20. Tr\u01b0\u1edbc DNS, m\u1ecdi m\u00e1y t\u00ednh tr\u00ean internet ch\u1ec9 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng m\u1ed9t \u0111\u1ecba ch\u1ec9 IP. Nh\u1eefng chu\u1ed7i s\u1ed1 n\u00e0y r\u1ea5t kh\u00f3 ghi nh\u1edb v\u00e0 s\u1eed d\u1ee5ng, d\u1eabn \u0111\u1ebfn vi\u1ec7c ph\u00e1t tri\u1ec3n m\u1ed9t h\u1ec7 th\u1ed1ng tr\u1ef1c quan h\u01a1n.<\/p>\n<p>Vi\u1ec7c tri\u1ec3n khai DNS \u0111\u1ea7u ti\u00ean l\u00e0 v\u00e0o n\u0103m 1983 b\u1edfi Paul Mockapetris, m\u1ed9t nh\u00e0 khoa h\u1ecdc m\u00e1y t\u00ednh t\u1ea1i Vi\u1ec7n Khoa h\u1ecdc Th\u00f4ng tin c\u1ee7a \u0110\u1ea1i h\u1ecdc Nam California. H\u1ec7 th\u1ed1ng c\u1ee7a \u00f4ng, ban \u0111\u1ea7u \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n d\u01b0\u1edbi d\u1ea1ng T\u00e0i li\u1ec7u c\u1ee7a L\u1ef1c l\u01b0\u1ee3ng \u0111\u1eb7c nhi\u1ec7m k\u1ef9 thu\u1eadt Internet (IETF) RFC 882 v\u00e0 RFC 883, \u0111\u00e3 c\u00e1ch m\u1ea1ng h\u00f3a c\u00e1ch m\u00e1y t\u00ednh giao ti\u1ebfp qua internet v\u00e0 v\u1eabn l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n cho \u0111\u1ebfn ng\u00e0y nay.<\/p>\n<h2>DNS \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1 chuy\u00ean s\u00e2u<\/h2>\n<p>Vai tr\u00f2 c\u01a1 b\u1ea3n c\u1ee7a H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n l\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP. Qu\u00e1 tr\u00ecnh n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e2n gi\u1ea3i DNS, bao g\u1ed3m m\u1ed9t chu\u1ed7i truy v\u1ea5n t\u1eeb m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn m\u1ed9t lo\u1ea1t m\u00e1y ch\u1ee7 DNS cho \u0111\u1ebfn khi t\u00ecm th\u1ea5y \u0111\u1ecba ch\u1ec9 IP ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n<p>H\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i, ngh\u0129a l\u00e0 kh\u00f4ng c\u00f3 th\u1ef1c th\u1ec3 \u0111\u01a1n l\u1ebb n\u00e0o ki\u1ec3m so\u00e1t DNS. Thay v\u00e0o \u0111\u00f3, \u0111\u00f3 l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi c\u00e1c m\u00e1y ch\u1ee7 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, g\u00f3p ph\u1ea7n t\u1ea1o n\u00ean s\u1ef1 m\u1ea1nh m\u1ebd v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a n\u00f3. H\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p b\u1eaft \u0111\u1ea7u t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c, sau \u0111\u00f3 l\u00e0 c\u00e1c Mi\u1ec1n c\u1ea5p cao nh\u1ea5t (TLD) nh\u01b0 .com, .net, .org, c\u00e1c mi\u1ec1n c\u1ea5p qu\u1ed1c gia nh\u01b0 .us, .uk, .in v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 c\u00e1c mi\u1ec1n c\u1ea5p hai (SLD) , \u0111\u00f3 l\u00e0 nh\u1eefng t\u00ean b\u1ea1n mua t\u1eeb nh\u00e0 \u0111\u0103ng k\u00fd.<\/p>\n<h2>Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a DNS<\/h2>\n<p>Qu\u00e1 tr\u00ecnh d\u1ecbch t\u00ean mi\u1ec1n sang \u0111\u1ecba ch\u1ec9 IP, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i DNS, th\u01b0\u1eddng di\u1ec5n ra trong v\u00f2ng m\u1ed9t ph\u1ea7n ngh\u00ecn gi\u00e2y v\u00e0 bao g\u1ed3m m\u1ed9t s\u1ed1 b\u01b0\u1edbc:<\/p>\n<ol>\n<li>Khi b\u1ea1n nh\u1eadp t\u00ean mi\u1ec1n v\u00e0o tr\u00ecnh duy\u1ec7t, m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n s\u1ebd g\u1eedi truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS c\u1ee5c b\u1ed9, th\u01b0\u1eddng do Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) c\u1ee7a b\u1ea1n cung c\u1ea5p.<\/li>\n<li>N\u1ebfu m\u00e1y ch\u1ee7 DNS c\u1ee5c b\u1ed9 kh\u00f4ng bi\u1ebft c\u00e2u tr\u1ea3 l\u1eddi, n\u00f3 s\u1ebd chuy\u1ec3n ti\u1ebfp truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 g\u1ed1c.<\/li>\n<li>M\u00e1y ch\u1ee7 g\u1ed1c ph\u1ea3n h\u1ed3i b\u1eb1ng \u0111\u1ecba ch\u1ec9 c\u1ee7a m\u00e1y ch\u1ee7 TLD ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 ti\u1ec7n \u00edch m\u1edf r\u1ed9ng (.com, .net, v.v.).<\/li>\n<li>Sau \u0111\u00f3, m\u00e1y ch\u1ee7 TLD s\u1ebd tr\u1ecf t\u1edbi m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n cho t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3.<\/li>\n<li>Cu\u1ed1i c\u00f9ng, m\u00e1y ch\u1ee7 c\u00f3 th\u1ea9m quy\u1ec1n cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP cho mi\u1ec1n v\u00e0 \u0111\u01b0\u1ee3c g\u1eedi tr\u1edf l\u1ea1i m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ol>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a DNS<\/h2>\n<p>DNS c\u00f3 m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh:<\/p>\n<ul>\n<li>\n<p><strong>C\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u00e2n t\u00e1n<\/strong>: C\u01a1 s\u1edf d\u1eef li\u1ec7u DNS \u0111\u01b0\u1ee3c tr\u1ea3i r\u1ed9ng tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, gi\u00fap n\u00e2ng cao kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a n\u00f3.<\/p>\n<\/li>\n<li>\n<p><strong>C\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p<\/strong>: C\u1ea5u tr\u00fac DNS cho ph\u00e9p ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3, m\u1edf r\u1ed9ng quy m\u00f4 t\u1eeb m\u1ea1ng c\u1ee5c b\u1ed9 \u0111\u1ebfn internet to\u00e0n c\u1ea7u.<\/p>\n<\/li>\n<li>\n<p><strong>Dung sai l\u1ed7i<\/strong>: Do t\u00ednh ch\u1ea5t ph\u00e2n t\u00e1n c\u1ee7a n\u00f3, h\u1ec7 th\u1ed1ng DNS \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i. N\u1ebfu m\u1ed9t m\u00e1y ch\u1ee7 b\u1ecb l\u1ed7i, nh\u1eefng m\u00e1y ch\u1ee7 kh\u00e1c v\u1eabn c\u00f3 th\u1ec3 cung c\u1ea5p th\u00f4ng tin c\u1ea7n thi\u1ebft.<\/p>\n<\/li>\n<li>\n<p><strong>B\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong>: \u0110\u1ec3 t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i, m\u00e1y ch\u1ee7 DNS l\u01b0u v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00e1c ph\u1ea3n h\u1ed3i m\u00e0 ch\u00fang nh\u1eadn \u0111\u01b0\u1ee3c. T\u00ednh n\u0103ng n\u00e0y cho ph\u00e9p m\u00e1y ch\u1ee7 ghi nh\u1edb \u0111\u1ecba ch\u1ec9 IP c\u1ee7a mi\u1ec1n, gi\u1ea3m nhu c\u1ea7u ph\u00e2n gi\u1ea3i \u0111\u1ea7y \u0111\u1ee7 cho m\u1ed7i truy v\u1ea5n.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i m\u00e1y ch\u1ee7 DNS kh\u00e1c nhau<\/h2>\n<p>C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i m\u00e1y ch\u1ee7 DNS, m\u1ed7i lo\u1ea1i c\u00f3 vai tr\u00f2 ri\u00eang:<\/p>\n<ul>\n<li>\n<p><strong>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS<\/strong>: \u0110i\u1ec3m li\u00ean h\u1ec7 \u0111\u1ea7u ti\u00ean c\u1ee7a kh\u00e1ch h\u00e0ng trong qu\u00e1 tr\u00ecnh truy v\u1ea5n DNS.<\/p>\n<\/li>\n<li>\n<p><strong>M\u00e1y ch\u1ee7 g\u1ed1c<\/strong>: C\u1ea5p cao nh\u1ea5t trong h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p DNS h\u01b0\u1edbng d\u1eabn c\u00e1c truy v\u1ea5n t\u1edbi \u0111\u00fang m\u00e1y ch\u1ee7 TLD.<\/p>\n<\/li>\n<li>\n<p><strong>M\u00e1y ch\u1ee7 TLD<\/strong>: Qu\u1ea3n l\u00fd th\u00f4ng tin v\u1ec1 c\u00e1c mi\u1ec1n theo TLD c\u1ee5 th\u1ec3 (.com, .net, v.v.).<\/p>\n<\/li>\n<li>\n<p><strong>M\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n<\/strong>: Gi\u1eef th\u00f4ng tin ch\u00ednh x\u00e1c v\u1ec1 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a t\u00ean mi\u1ec1n.<\/p>\n<\/li>\n<\/ul>\n<h2>\u1ee8ng d\u1ee5ng DNS, th\u00e1ch th\u1ee9c v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<p>DNS kh\u00f4ng ch\u1ec9 c\u00f3 ch\u1ee9c n\u0103ng ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 IP; n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn email, li\u1ec7t k\u00ea c\u00e1c m\u00e1y ch\u1ee7 trao \u0111\u1ed5i th\u01b0 cho m\u1ed9t mi\u1ec1n v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 theo mi\u1ec1n kh\u00e1c.<\/p>\n<p>Tuy nhi\u00ean, DNS ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c b\u1ea3o m\u1eadt, bao g\u1ed3m c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o DNS v\u00e0 khu\u1ebfch \u0111\u1ea1i DNS. C\u00e1c gi\u1ea3i ph\u00e1p nh\u01b0 DNSSEC (Ti\u1ec7n \u00edch m\u1edf r\u1ed9ng b\u1ea3o m\u1eadt h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n v\u00e0 x\u00e1c th\u1ef1c c\u1ee7a d\u1eef li\u1ec7u DNS. DNSSEC ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i \u0111e d\u1ecda b\u1eb1ng c\u00e1ch k\u00fd \u0111i\u1ec7n t\u1eed d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb gi\u1ea3 m\u1ea1o trong qu\u00e1 tr\u00ecnh truy\u1ec1n.<\/p>\n<h2>So s\u00e1nh DNS v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>M\u1eb7c d\u00f9 DNS l\u00e0 h\u1ec7 th\u1ed1ng ch\u00ednh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n gi\u1ea3i mi\u1ec1n th\u00e0nh IP nh\u01b0ng v\u1eabn c\u00f3 c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf:<\/p>\n<table>\n<thead>\n<tr>\n<th>H\u1ec7 th\u1ed1ng<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS<\/td>\n<td>H\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, ph\u00e2n c\u1ea5p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean internet. Cung c\u1ea5p s\u1ef1 m\u1ea1nh m\u1ebd, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i.<\/td>\n<\/tr>\n<tr>\n<td>T\u1eadp tin m\u00e1y ch\u1ee7<\/td>\n<td>M\u1ed9t t\u1ec7p c\u1ee5c b\u1ed9 trong h\u1ec7 \u0111i\u1ec1u h\u00e0nh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u00e1nh x\u1ea1 t\u00ean m\u00e1y ch\u1ee7 th\u00e0nh \u0111\u1ecba ch\u1ec9 IP. Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng h\u1ea1n ch\u1ebf.<\/td>\n<\/tr>\n<tr>\n<td>mDNS (DNS \u0111a h\u01b0\u1edbng)<\/td>\n<td>Ph\u00e2n gi\u1ea3i t\u00ean m\u00e1y ch\u1ee7 th\u00e0nh \u0111\u1ecba ch\u1ec9 IP trong c\u00e1c m\u1ea1ng nh\u1ecf. Kh\u00f4ng y\u00eau c\u1ea7u m\u00e1y ch\u1ee7 DNS ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh s\u1eb5n.<\/td>\n<\/tr>\n<tr>\n<td>LDAP (Giao th\u1ee9c truy c\u1eadp th\u01b0 m\u1ee5c nh\u1eb9)<\/td>\n<td>Giao th\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy c\u1eadp v\u00e0 duy tr\u00ec c\u00e1c d\u1ecbch v\u1ee5 th\u00f4ng tin th\u01b0 m\u1ee5c ph\u00e2n t\u00e1n. Ph\u1ee9c t\u1ea1p h\u01a1n DNS.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai trong DNS<\/h2>\n<p>DNS ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i v\u00e0 nhu c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. DNS over HTTPS (DoH) v\u00e0 DNS over TLS (DoT) l\u00e0 c\u00e1c giao th\u1ee9c m\u1edbi m\u00e3 h\u00f3a l\u01b0u l\u01b0\u1ee3ng DNS, t\u0103ng c\u01b0\u1eddng quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>H\u01a1n n\u1eefa, khi c\u00e1c thi\u1ebft b\u1ecb Internet of Things (IoT) \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean, ho\u1ea1t \u0111\u1ed9ng DNS hi\u1ec7u qu\u1ea3 s\u1ebd r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec giao ti\u1ebfp m\u1ea1ng tr\u01a1n tru v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 DNS<\/h2>\n<p>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. Nh\u1eefng y\u00eau c\u1ea7u n\u00e0y c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c truy c\u1eadp m\u1ed9t trang web, trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3 m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi DNS \u0111\u1ec3 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n.<\/p>\n<p>Proxy DNS, m\u1ed9t lo\u1ea1i m\u00e1y ch\u1ee7 proxy, chuy\u1ec3n ti\u1ebfp c\u00e1c truy v\u1ea5n DNS t\u1eeb thi\u1ebft b\u1ecb \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS, n\u00e2ng cao hi\u1ec7u su\u1ea5t th\u00f4ng qua b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng b\u1ed5 sung nh\u01b0 l\u1ecdc n\u1ed9i dung ho\u1eb7c b\u1ea3o m\u1eadt n\u00e2ng cao.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc1034\" target=\"_new\" rel=\"noopener nofollow\">IETF \u2013 T\u00ean mi\u1ec1n \u2013 Kh\u00e1i ni\u1ec7m v\u00e0 ti\u1ec7n \u00edch<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc1035\" target=\"_new\" rel=\"noopener nofollow\">IETF \u2013 T\u00ean mi\u1ec1n \u2013 Tri\u1ec3n khai v\u00e0 \u0111\u1eb7c t\u1ea3<\/a><\/li>\n<li><a href=\"https:\/\/www.icann.org\/resources\/pages\/dnssec-what-is-it-why-important-2019-03-05-en\" target=\"_new\" rel=\"noopener nofollow\">DNSSEC: N\u00f3 l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 quan tr\u1ecdng?<\/a><\/li>\n<\/ul>\n<p>B\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ed7i v\u00e0 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng, DNS ti\u1ebfp t\u1ee5c l\u00e0 tr\u1ee5 c\u1ed9t trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Internet. Khi n\u00f3 ph\u00e1t tri\u1ec3n c\u00f9ng v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i v\u00e0 nhu c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, DNS s\u1ebd ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 nghi\u00ean c\u1ee9u v\u00e0 hi\u1ec3u bi\u1ebft quan tr\u1ecdng trong l\u0129nh v\u1ef1c truy\u1ec1n th\u00f4ng internet.<\/p>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476872","wiki","type-wiki","status-publish","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>The Domain Name System: An Essential Facet of Internet Communication<\/mark>","faq_items":[{"question":"What is the Domain Name System (DNS)?","answer":"<p>The Domain Name System (DNS) is a crucial component of the internet, functioning as the phonebook of the World Wide Web. It translates human-friendly website names into the numeric IP addresses that computers use to connect with each other.<\/p>"},{"question":"When and why was the DNS first created?","answer":"<p>The first implementation of DNS was in 1983 by Paul Mockapetris. It was created to simplify and enhance the efficiency of internet communication as it grew rapidly. Prior to DNS, every computer on the internet was identified solely by an IP address, making it challenging to remember and use, thus leading to the development of a more intuitive system.<\/p>"},{"question":"How does DNS work?","answer":"<p>DNS works by converting domain names into IP addresses in a process known as DNS resolution. It involves a sequence of queries from the user's computer to a series of DNS servers until it finds the correct IP address that corresponds to the requested domain name.<\/p>"},{"question":"What are some key features of DNS?","answer":"<p>Key features of DNS include its distributed database which enhances accessibility and reliability, a hierarchical structure for efficient domain name resolution, fault tolerance to handle server failures, and caching to speed up the resolution process.<\/p>"},{"question":"What types of DNS servers exist?","answer":"<p>There are several types of DNS servers, each with unique roles: DNS Resolver (the client's first point of contact in the DNS query process), Root Server (guides queries towards the right TLD server), TLD Server (manages information about the domains under a specific TLD), and Authoritative DNS Server (holds the definitive information about a domain's IP address).<\/p>"},{"question":"What are some problems and solutions related to DNS?","answer":"<p>DNS faces several security challenges such as DNS spoofing and DNS amplification attacks. A solution like DNSSEC (Domain Name System Security Extensions) ensures the integrity and authenticity of DNS data by digitally signing data to confirm it hasn't been tampered with during transit.<\/p>"},{"question":"What is the relation between proxy servers and DNS?","answer":"<p>Proxy servers serve as intermediaries for requests from clients seeking resources from other servers. These requests could involve accessing a webpage, in which case the proxy server may interact with DNS to resolve the domain name. DNS proxy is a type of proxy server that forwards DNS queries from devices to a DNS server.<\/p>"},{"question":"What are some future perspectives and technologies in DNS?","answer":"<p>DNS continues to evolve with emerging technologies and user demands. DNS over HTTPS (DoH) and DNS over TLS (DoT) are new protocols that encrypt DNS traffic, enhancing user privacy and security. As Internet of Things (IoT) devices multiply, efficient DNS operations will be crucial in maintaining smooth and reliable network communication.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476872","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\/476872\/revisions"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}