{"id":476873,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:37","modified_gmt":"2023-09-05T11:13:37","slug":"dns-a-record","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns-a-record\/","title":{"rendered":"B\u1ea3n ghi DNS A"},"content":{"rendered":"<p>B\u1ea3n ghi DNS A l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS), gi\u00fap d\u1ecbch c\u00e1c t\u00ean mi\u1ec1n th\u00e2n thi\u1ec7n v\u1edbi con ng\u01b0\u1eddi sang \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng c\u1ee7a ch\u00fang. N\u00f3 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho giao ti\u1ebfp qua internet, gi\u00fap ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u00e1c trang web b\u1eb1ng t\u00ean mi\u1ec1n \u0111\u01a1n gi\u1ea3n thay v\u00ec \u0111\u1ecba ch\u1ec9 IP s\u1ed1.<\/p>\n<h2>B\u1ed1i c\u1ea3nh l\u1ecbch s\u1eed v\u00e0 nh\u1eefng \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean<\/h2>\n<p>B\u1ea3n ghi DNS A theo d\u00f5i ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00f3 t\u1eeb khi b\u1eaft \u0111\u1ea7u H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n. RFC DNS \u0111\u1ea7u ti\u00ean, \u201cRFC 882 \u2013 T\u00ean mi\u1ec1n \u2013 Kh\u00e1i ni\u1ec7m v\u00e0 C\u01a1 s\u1edf,\u201d \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o th\u00e1ng 11 n\u0103m 1983 v\u00e0 n\u00f3 th\u1ea3o lu\u1eadn v\u1ec1 kh\u00e1i ni\u1ec7m b\u1ea3n ghi DNS, bao g\u1ed3m B\u1ea3n ghi A. Jon Postel v\u00e0 Paul Mockapetris, c\u00e1c t\u00e1c gi\u1ea3 ch\u00ednh c\u1ee7a RFC, \u0111\u00e3 t\u00ecm c\u00e1ch t\u1ea1o ra m\u1ed9t d\u1ecbch v\u1ee5 th\u01b0 m\u1ee5c internet ph\u00e2n t\u00e1n v\u00e0 ph\u00e2n t\u00e1n, v\u00e0 A Record l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a gi\u1ea3i ph\u00e1p n\u00e0y.<\/p>\n<h2>Hi\u1ec3u b\u1ea3n ghi DNS A<\/h2>\n<p>B\u1ea3n ghi DNS A ho\u1eb7c B\u1ea3n ghi \u0111\u1ecba ch\u1ec9 s\u1ebd \u00e1nh x\u1ea1 mi\u1ec1n t\u1edbi \u0111\u1ecba ch\u1ec9 IP v\u1eadt l\u00fd c\u1ee7a m\u00e1y ch\u1ee7 n\u01a1i l\u01b0u tr\u1eef t\u1ec7p trang web. \u0110\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Internet; khi b\u1ea1n nh\u1eadp URL v\u00e0o tr\u00ecnh duy\u1ec7t, n\u00f3 s\u1ebd th\u1ef1c hi\u1ec7n truy v\u1ea5n DNS \u0111\u1ec3 t\u00ecm B\u1ea3n ghi A cho mi\u1ec1n \u0111\u00f3, ch\u1ee9a \u0111\u1ecba ch\u1ec9 IP c\u1ea7n thi\u1ebft \u0111\u1ec3 truy xu\u1ea5t n\u1ed9i dung c\u1ee7a trang web.<\/p>\n<p>M\u1ed7i B\u1ea3n ghi A bao g\u1ed3m b\u1ed1n ph\u1ea7n ch\u00ednh:<\/p>\n<ol>\n<li>T\u00ean mi\u1ec1n<\/li>\n<li>Lo\u1ea1i b\u1ea3n ghi (A)<\/li>\n<li>TTL (Th\u1eddi gian \u0111\u1ec3 s\u1ed1ng)<\/li>\n<li>\u0110\u1ecba ch\u1ec9 IP<\/li>\n<\/ol>\n<h2>Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a b\u1ea3n ghi DNS A<\/h2>\n<p>Qu\u00e1 tr\u00ecnh b\u1eaft \u0111\u1ea7u khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u m\u1ed9t trang web b\u1eb1ng c\u00e1ch nh\u1eadp URL v\u00e0o tr\u00ecnh duy\u1ec7t c\u1ee7a h\u1ecd. Tr\u00ecnh duy\u1ec7t b\u1eaft \u0111\u1ea7u truy v\u1ea5n DNS \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u00ean mi\u1ec1n. Truy v\u1ea5n n\u00e0y \u0111i \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS, n\u01a1i duy tr\u00ec m\u1ed9t th\u01b0 m\u1ee5c t\u00ean mi\u1ec1n v\u00e0 \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng c\u1ee7a ch\u00fang.<\/p>\n<p>M\u00e1y ch\u1ee7 ki\u1ec3m tra th\u01b0 m\u1ee5c c\u1ee7a n\u00f3 \u0111\u1ec3 t\u00ecm B\u1ea3n ghi A c\u1ee7a mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u, b\u1ea3n ghi n\u00e0y cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP. \u0110\u1ecba ch\u1ec9 IP n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, tr\u00ecnh duy\u1ec7t n\u00e0y c\u00f3 th\u1ec3 t\u1ea1o k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef n\u1ed9i dung c\u1ee7a trang web.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a B\u1ea3n ghi DNS A<\/h2>\n<ul>\n<li><strong>S\u1ef1 \u0111\u01a1n gi\u1ea3n<\/strong>: B\u1ea3n ghi A gi\u00fap ng\u01b0\u1eddi d\u00f9ng duy\u1ec7t internet d\u1ec5 d\u00e0ng h\u01a1n v\u00ec h\u1ecd ch\u1ec9 c\u1ea7n nh\u1edb t\u00ean mi\u1ec1n thay v\u00ec \u0111\u1ecba ch\u1ec9 IP.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong>: C\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p v\u00e0 ph\u00e2n c\u1ea5p c\u1ee7a h\u1ec7 th\u1ed1ng DNS, bao g\u1ed3m B\u1ea3n ghi A, cho ph\u00e9p h\u1ec7 th\u1ed1ng x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng Internet v\u00e0 trang web ng\u00e0y c\u00e0ng t\u0103ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/li>\n<li><strong>Uy\u1ec3n chuy\u1ec3n<\/strong>: A B\u1ea3n ghi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt ho\u1eb7c thay \u0111\u1ed5i theo y\u00eau c\u1ea7u, cho ph\u00e9p tr\u1ecf t\u00ean mi\u1ec1n li\u00ean quan \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IP kh\u00e1c.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i b\u1ea3n ghi DNS A<\/h2>\n<p>B\u1ea3n ghi DNS A c\u00f3 hai lo\u1ea1i c\u1ee5 th\u1ec3:<\/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>M\u1ed9t b\u1ea3n ghi<\/td>\n<td>\u00c1nh x\u1ea1 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n ph\u1ee5 t\u1edbi \u0111\u1ecba ch\u1ec9 IPv4<\/td>\n<\/tr>\n<tr>\n<td>K\u1ef7 l\u1ee5c AAAA<\/td>\n<td>C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ea3n ghi \u201cquad-A\u201d, \u00e1nh x\u1ea1 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n ph\u1ee5 t\u1edbi \u0111\u1ecba ch\u1ec9 IPv6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng, s\u1ef1 c\u1ed1 v\u00e0 gi\u1ea3i ph\u00e1p v\u1edbi b\u1ea3n ghi DNS A<\/h2>\n<p>A B\u1ea3n ghi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong l\u01b0u tr\u1eef web, c\u00e2n b\u1eb1ng t\u1ea3i, \u0111\u1ecbnh v\u1ecb \u0111\u1ecba l\u00fd v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c. Tuy nhi\u00ean, c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n bao g\u1ed3m \u0111\u1ed9 tr\u1ec5 truy\u1ec1n (c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u b\u1eb1ng c\u00e1ch gi\u1ea3m TTL) v\u00e0 gi\u1ea3 m\u1ea1o DNS (c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng DNSSEC).<\/p>\n<h2>So s\u00e1nh v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u00dd t\u01b0\u1edfng<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ed9t b\u1ea3n ghi<\/td>\n<td>\u00c1nh x\u1ea1 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n ph\u1ee5 t\u1edbi \u0111\u1ecba ch\u1ec9 IPv4<\/td>\n<\/tr>\n<tr>\n<td>K\u1ef7 l\u1ee5c AAAA<\/td>\n<td>\u00c1nh x\u1ea1 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n ph\u1ee5 t\u1edbi \u0111\u1ecba ch\u1ec9 IPv6<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3n ghi CNAME<\/td>\n<td>\u00c1nh x\u1ea1 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n ph\u1ee5 t\u1edbi m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c<\/td>\n<\/tr>\n<tr>\n<td>B\u1ea3n ghi MX<\/td>\n<td>Ch\u1ec9 \u0111\u1ecbnh m\u00e1y ch\u1ee7 th\u01b0 ch\u1ecbu tr\u00e1ch nhi\u1ec7m ch\u1ea5p nh\u1eadn email thay m\u1eb7t cho m\u1ed9t mi\u1ec1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai c\u1ee7a b\u1ea3n ghi DNS A<\/h2>\n<p>Khi internet ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, B\u1ea3n ghi DNS A s\u1ebd v\u1eabn r\u1ea5t quan tr\u1ecdng. Ch\u00fang t\u00f4i hy v\u1ecdng s\u1ebd th\u1ea5y vi\u1ec7c s\u1eed d\u1ee5ng DNSSEC ng\u00e0y c\u00e0ng t\u0103ng cho c\u00e1c truy v\u1ea5n DNS an to\u00e0n, \u0111\u1ecba ch\u1ec9 IPv6 cho ph\u1ea1m vi IP r\u1ed9ng h\u01a1n c\u0169ng nh\u01b0 c\u00e1c k\u1ef9 thu\u1eadt \u0111\u1ecbnh v\u1ecb \u0111\u1ecba l\u00fd v\u00e0 c\u00e2n b\u1eb1ng t\u1ea3i d\u1ef1a tr\u00ean DNS ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n<h2>B\u1ea3n ghi DNS A v\u00e0 m\u00e1y ch\u1ee7 proxy<\/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 th\u01b0\u1eddng s\u1eed d\u1ee5ng B\u1ea3n ghi DNS A \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 IP c\u1ee7a c\u00e1c trang web m\u00e0 ch\u00fang \u0111ang \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u1edbi. M\u00e1y ch\u1ee7 proxy nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u URL, th\u1ef1c hi\u1ec7n truy v\u1ea5n DNS cho \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng v\u00e0 sau \u0111\u00f3 \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 \u0111\u00f3.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc882\" target=\"_new\" rel=\"noopener nofollow\">RFC 882 \u2013 T\u00ean mi\u1ec1n \u2013 Kh\u00e1i ni\u1ec7m v\u00e0 ti\u1ec7n \u00edch<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-records\/\" target=\"_new\" rel=\"noopener nofollow\">Hi\u1ec3u c\u00e1c lo\u1ea1i b\u1ea3n ghi DNS<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/dns\/dnssec\/how-dnssec-works\/\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1ea3i th\u00edch v\u1ec1 DNSSEC<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/\" target=\"_new\" rel=\"noopener\">OneProxy \u2013 Gi\u1ea3i ph\u00e1p m\u00e1y ch\u1ee7 proxy n\u00e2ng cao<\/a><\/li>\n<\/ul>","protected":false},"featured_media":476874,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476873","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>DNS A Record: A Comprehensive Analysis<\/mark>","faq_items":[{"question":"What is a DNS A Record?","answer":"<p>A DNS A Record, also known as an Address Record, is a fundamental component of the Domain Name System (DNS). It links a domain to the physical IP address of the server where the website files are located. When you input a URL into your browser, a DNS query locates the A Record for that domain, which holds the IP address required to fetch the website's content.<\/p>"},{"question":"When were DNS A Records first introduced?","answer":"<p>The concept of DNS A Records was introduced in November 1983 with the publication of the first DNS RFC, \"RFC 882 - Domain Names - Concepts and Facilities.\" The main authors of the RFC, Jon Postel and Paul Mockapetris, developed this system to create a decentralized and distributed internet directory service, with the A Record playing a crucial part in this system.<\/p>"},{"question":"How does a DNS A Record work?","answer":"<p>A DNS A Record functions by associating a domain with a server's IP address. When a user requests a website by typing a URL into their browser, the browser initiates a DNS query to locate the IP address related to the domain name. The query goes to a DNS server, which maintains a directory of domain names and their respective IP addresses. The server checks its directory for the requested domain's A Record, which provides the IP address, and this IP address is then returned to the user's browser.<\/p>"},{"question":"What are the key features of a DNS A Record?","answer":"<p>The key features of a DNS A Record include its simplicity, scalability, and flexibility. The simplicity allows users to access websites using domain names instead of remembering numerical IP addresses. The scalability of the DNS system, including A Records, helps handle the growing number of internet users and websites effectively. The flexibility allows the A Records to be updated or changed as needed, enabling the domain to point to different IP addresses.<\/p>"},{"question":"What types of DNS A Records exist?","answer":"<p>There are two specific types of DNS A Records: the A Record, which maps a domain or subdomain to an IPv4 address, and the AAAA Record (also known as a \"quad-A\" record), which maps a domain or subdomain to an IPv6 address.<\/p>"},{"question":"What are some common uses and issues related to DNS A Records?","answer":"<p>DNS A Records are used in various ways, including web hosting, load balancing, and geolocation. Some common issues related to DNS A Records are propagation delays, which can be mitigated by reducing the TTL (Time to Live), and DNS spoofing, which can be prevented using DNSSEC (Domain Name System Security Extensions).<\/p>"},{"question":"How are DNS A Records related to proxy servers?","answer":"<p>Proxy servers, like those provided by OneProxy, often use DNS A Records to determine the IP addresses of the websites to which they're routing traffic. The proxy server receives a URL request, performs a DNS query for the corresponding IP address, and then routes the user's traffic to that IP address.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476873","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\/476873\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476874"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}