{"id":4827,"date":"2023-10-18T12:22:00","date_gmt":"2023-10-18T12:22:00","guid":{"rendered":"https:\/\/zynoo.com\/blog\/what-is-dns\/"},"modified":"2026-10-31T13:15:35","modified_gmt":"2026-10-31T13:15:35","slug":"what-is-dns","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/vi\/what-is-dns\/","title":{"rendered":"DNS l\u00e0 g\u00ec? C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 t\u1ea7m quan tr\u1ecdng"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n)<\/strong> l\u00e0 h\u1ec7 th\u1ed1ng k\u1ebft n\u1ed1i t\u00ean mi\u1ec1n, ch\u1eb3ng h\u1ea1n nh\u01b0 <code>example.com<\/code>, v\u1edbi c\u00e1c \u0111\u1ecba ch\u1ec9 IP m\u00e0 m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ecm trang web v\u00e0 c\u00e1c d\u1ecbch v\u1ee5 internet kh\u00e1c. Thay v\u00ec ph\u1ea3i nh\u1edb m\u1ed9t \u0111\u1ecba ch\u1ec9 g\u1ed3m c\u00e1c con s\u1ed1, b\u1ea1n ch\u1ec9 c\u1ea7n nh\u1eadp t\u00ean trang web v\u00e0o tr\u00ecnh duy\u1ec7t.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u01b0ng DNS kh\u00f4ng ch\u1ec9 gi\u00fap t\u1ea3i trang web. H\u1ec7 th\u1ed1ng n\u00e0y c\u00f2n \u0111\u1ecbnh tuy\u1ebfn email, h\u1ed7 tr\u1ee3 x\u00e1c minh t\u00ean mi\u1ec1n v\u00e0 gi\u00fap c\u00e1c d\u1ecbch v\u1ee5 internet t\u00ecm \u0111\u00fang m\u00e1y ch\u1ee7.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch DNS ho\u1ea1t \u0111\u1ed9ng v\u00e0 nh\u1eefng \u0111i\u1ec1u b\u1ea1n n\u00ean bi\u1ebft khi qu\u1ea3n l\u00fd m\u1ed9t trang web.<\/p>\n\n<h2 id=\"h-how-does-dns-work\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DNS_hoat_dong_nhu_the_nao\"><\/span>DNS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">H\u00e3y h\u00ecnh dung DNS nh\u01b0 danh b\u1ea1 \u0111\u1ecba ch\u1ec9 c\u1ee7a internet.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi b\u1ea1n nh\u1eadp <code>example.com<\/code> v\u00e0o tr\u00ecnh duy\u1ec7t, thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n c\u1ea7n t\u00ecm m\u00e1y ch\u1ee7 g\u1eafn v\u1edbi t\u00ean mi\u1ec1n \u0111\u00f3. DNS cung c\u1ea5p th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed m\u00e1y ch\u1ee7.<\/p>\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>ph\u00e2n gi\u1ea3i DNS<\/strong>.<\/p>\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng th\u01b0\u1eddng, qu\u00e1 tr\u00ecnh di\u1ec5n ra nh\u01b0 sau:<\/p>\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>B\u1ea1n nh\u1eadp t\u00ean mi\u1ec1n.<\/strong> Tr\u00ecnh duy\u1ec7t c\u1ea7n \u0111\u1ecba ch\u1ec9 IP g\u1eafn v\u1edbi trang web.<\/li>\n\n\n\n<li><strong>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS ki\u1ec3m tra b\u1ed9 nh\u1edb \u0111\u1ec7m.<\/strong> N\u1ebfu \u0111\u00e3 c\u00f3 c\u00e2u tr\u1ea3 l\u1eddi c\u00f2n hi\u1ec7u l\u1ef1c, tr\u00ecnh ph\u00e2n gi\u1ea3i c\u00f3 th\u1ec3 tr\u1ea3 v\u1ec1 ngay.<\/li>\n\n\n\n<li><strong>Tr\u00ecnh ph\u00e2n gi\u1ea3i tra c\u1ee9u t\u00ean mi\u1ec1n.<\/strong> N\u1ebfu c\u1ea7n, tr\u00ecnh ph\u00e2n gi\u1ea3i s\u1ebd truy v\u1ea5n h\u1ea1 t\u1ea7ng DNS, bao g\u1ed3m m\u00e1y ch\u1ee7 t\u00ean g\u1ed1c, m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t (TLD) v\u00e0 m\u00e1y ch\u1ee7 t\u00ean c\u00f3 th\u1ea9m quy\u1ec1n.<\/li>\n\n\n\n<li><strong>\u0110\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1.<\/strong> Th\u00f4ng tin DNS c\u00f3 th\u1ea9m quy\u1ec1n cho tr\u00ecnh ph\u00e2n gi\u1ea3i bi\u1ebft t\u00ean m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u tr\u1ecf \u0111\u1ebfn \u0111\u00e2u.<\/li>\n\n\n\n<li><strong>Tr\u00ecnh duy\u1ec7t k\u1ebft n\u1ed1i v\u1edbi trang web.<\/strong> Tr\u00ecnh duy\u1ec7t d\u00f9ng \u0111\u1ecba ch\u1ec9 nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i v\u00e0 y\u00eau c\u1ea7u trang web.<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng di\u1ec5n ra t\u1ef1 \u0111\u1ed9ng m\u00e0 b\u1ea1n kh\u00f4ng nh\u1eadn th\u1ea5y.<\/p>\n\n<p class=\"wp-block-paragraph\">DNS kh\u00f4ng l\u01b0u tr\u1eef c\u00e1c trang ho\u1eb7c h\u00ecnh \u1ea3nh tr\u00ean trang web c\u1ee7a b\u1ea1n. H\u1ec7 th\u1ed1ng n\u00e0y gi\u00fap tr\u00ecnh duy\u1ec7t t\u00ecm h\u1ea1 t\u1ea7ng cung c\u1ea5p nh\u1eefng n\u1ed9i dung \u0111\u00f3.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works-1024x576.webp\" alt=\"c\u00e1ch DNS ho\u1ea1t \u0111\u1ed9ng\" class=\"wp-image-4801\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/how-dns-works.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 id=\"h-what-are-dns-servers\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_DNS_la_gi\"><\/span>M\u00e1y ch\u1ee7 DNS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u lo\u1ea1i m\u00e1y ch\u1ee7 DNS ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n.<\/p>\n\n<h3 id=\"h-recursive-dns-resolver\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Trinh_phan_giai_DNS_de_quy\"><\/span>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111\u1ec7 quy<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Tr\u00ecnh ph\u00e2n gi\u1ea3i \u0111\u1ec7 quy nh\u1eadn y\u00eau c\u1ea7u DNS t\u1eeb thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n v\u00e0 t\u00ecm c\u00e2u tr\u1ea3 l\u1eddi.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 internet c\u00f3 th\u1ec3 cung c\u1ea5p tr\u00ecnh ph\u00e2n gi\u1ea3i cho b\u1ea1n. Ngo\u00e0i ra, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c d\u1ecbch v\u1ee5 c\u00f4ng c\u1ed9ng nh\u01b0 Cloudflare DNS v\u00e0 Google Public DNS.<\/p>\n\n<h3 id=\"h-root-nameserver\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_ten_goc\"><\/span>M\u00e1y ch\u1ee7 t\u00ean g\u1ed1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 t\u00ean g\u1ed1c gi\u00fap chuy\u1ec3n h\u01b0\u1edbng c\u00e1c truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 t\u00ean ph\u1ee5 tr\u00e1ch nh\u1eefng t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t nh\u01b0 <code>.com<\/code>, <code>.net<\/code> v\u00e0 <code>.org<\/code>.<\/p>\n\n<h3 id=\"h-tld-nameserver\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_ten_TLD\"><\/span>M\u00e1y ch\u1ee7 t\u00ean TLD<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t cho bi\u1ebft n\u01a1i t\u00ecm c\u00e1c m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u0103ng k\u00fd c\u1ee5 th\u1ec3.<\/p>\n\n<h3 id=\"h-authoritative-nameserver\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_ten_co_tham_quyen\"><\/span>M\u00e1y ch\u1ee7 t\u00ean c\u00f3 th\u1ea9m quy\u1ec1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 t\u00ean c\u00f3 th\u1ea9m quy\u1ec1n l\u01b0u gi\u1eef c\u00e1c b\u1ea3n ghi DNS c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n v\u00e0 cung c\u1ea5p th\u00f4ng tin ch\u00ednh th\u1ee9c d\u00f9ng \u0111\u1ec3 ph\u00e2n gi\u1ea3i c\u00e1c t\u00ean m\u00e1y ch\u1ee7 thu\u1ed9c t\u00ean mi\u1ec1n \u0111\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi qu\u1ea3n l\u00fd trang web, c\u00e1c b\u1ea3n ghi DNS c\u00f3 th\u1ea9m quy\u1ec1n n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng.<\/p>\n\n<h2 id=\"h-common-dns-record-types-explained\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Giai_thich_cac_loai_ban_ghi_DNS_pho_bien\"><\/span>Gi\u1ea3i th\u00edch c\u00e1c lo\u1ea1i b\u1ea3n ghi DNS ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">B\u1ea3n ghi DNS quy\u1ebft \u0111\u1ecbnh c\u00e1ch x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed v\u00e0 c\u1ea5u h\u00ecnh c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c nhau g\u1eafn v\u1edbi t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng lo\u1ea1i b\u1ea3n ghi m\u00e0 ch\u1ee7 s\u1edf h\u1eefu trang web th\u01b0\u1eddng g\u1eb7p nh\u1ea5t.<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>B\u1ea3n ghi<\/th><th>M\u1ee5c \u0111\u00edch<\/th><th>V\u00ed d\u1ee5<\/th><\/tr><tr><td>A<\/td><td>Tr\u1ecf t\u00ean m\u00e1y ch\u1ee7 \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4<\/td><td><code>192.0.2.10<\/code><\/td><\/tr><tr><td>AAAA<\/td><td>Tr\u1ecf t\u00ean m\u00e1y ch\u1ee7 \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv6<\/td><td><code>2001:db8::10<\/code><\/td><\/tr><tr><td>CNAME<\/td><td>\u0110\u1eb7t m\u1ed9t t\u00ean m\u00e1y ch\u1ee7 l\u00e0m b\u00ed danh c\u1ee7a t\u00ean m\u00e1y ch\u1ee7 kh\u00e1c<\/td><td><code>www<\/code> \u2192 <code>example.com<\/code><\/td><\/tr><tr><td>MX<\/td><td>X\u00e1c \u0111\u1ecbnh m\u00e1y ch\u1ee7 email c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n<\/td><td><code>mail.example.com<\/code><\/td><\/tr><tr><td>TXT<\/td><td>L\u01b0u v\u0103n b\u1ea3n d\u00f9ng \u0111\u1ec3 x\u00e1c minh v\u00e0 b\u1ea3o m\u1eadt email<\/td><td>SPF ho\u1eb7c x\u00e1c minh t\u00ean mi\u1ec1n<\/td><\/tr><tr><td>NS<\/td><td>X\u00e1c \u0111\u1ecbnh c\u00e1c m\u00e1y ch\u1ee7 t\u00ean c\u00f3 th\u1ea9m quy\u1ec1n<\/td><td><code>ns1.example.net<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111\u1ecba ch\u1ec9 IP \u1edf tr\u00ean ch\u1ec9 l\u00e0 v\u00ed d\u1ee5 d\u00f9ng trong t\u00e0i li\u1ec7u, kh\u00f4ng ph\u1ea3i \u0111\u1ecba ch\u1ec9 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef th\u1ef1c t\u1ebf.<\/p>\n\n<h3 id=\"h-why-do-dns-records-matter\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vi_sao_ban_ghi_DNS_quan_trong\"><\/span>V\u00ec sao b\u1ea3n ghi DNS quan tr\u1ecdng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed b\u1ea1n \u0111\u00e3 mua m\u1ed9t t\u00ean mi\u1ec1n v\u00e0 m\u1ed9t g\u00f3i l\u01b0u tr\u1eef web.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u1ec7p c\u1ee7a trang web \u0111\u01b0\u1ee3c l\u01b0u tr\u00ean m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef, nh\u01b0ng kh\u00e1ch truy c\u1eadp v\u1eabn c\u1ea7n c\u00f3 c\u00e1ch t\u00ecm \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea3n ghi A c\u00f3 th\u1ec3 tr\u1ecf t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IPv4 c\u1ee7a m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef. Trong khi \u0111\u00f3, b\u1ea3n ghi MX chuy\u1ec3n email \u0111\u1ebfn \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 email ph\u00f9 h\u1ee3p.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea3n ghi kh\u00f4ng ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 khi\u1ebfn trang web kh\u00f4ng th\u1ec3 truy c\u1eadp ho\u1eb7c email kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn n\u01a1i, ngay c\u1ea3 khi m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n<h2 id=\"h-dns-vs-domain-name-vs-web-hosting\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phan_biet_DNS_ten_mien_va_dich_vu_luu_tru_web\"><\/span>Ph\u00e2n bi\u1ec7t DNS, t\u00ean mi\u1ec1n v\u00e0 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Ba thu\u1eadt ng\u1eef n\u00e0y c\u00f3 li\u00ean quan nh\u01b0ng mang \u00fd ngh\u0129a kh\u00e1c nhau.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>T\u00ean mi\u1ec1n:<\/strong> \u0110\u1ecba ch\u1ec9 d\u1ec5 \u0111\u1ecdc m\u00e0 m\u1ecdi ng\u01b0\u1eddi nh\u1eadp \u0111\u1ec3 t\u00ecm trang web c\u1ee7a b\u1ea1n, ch\u1eb3ng h\u1ea1n nh\u01b0 <code>example.com<\/code>.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>DNS:<\/strong> H\u1ec7 th\u1ed1ng cung c\u1ea5p th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u00e1c d\u1ecbch v\u1ee5 g\u1eafn v\u1edbi t\u00ean mi\u1ec1n \u0111\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web:<\/strong> H\u1ea1 t\u1ea7ng l\u01b0u tr\u1eef v\u00e0 cung c\u1ea5p c\u00e1c t\u1ec7p c\u00f9ng \u1ee9ng d\u1ee5ng c\u1ee7a trang web.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i mua c\u1ea3 ba t\u1eeb c\u00f9ng m\u1ed9t nh\u00e0 cung c\u1ea5p.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n v\u1edbi m\u1ed9t c\u00f4ng ty, \u0111\u1ec3 c\u00f4ng ty kh\u00e1c qu\u1ea3n l\u00fd DNS v\u00e0 l\u01b0u tr\u1eef trang web tr\u00ean m\u00e1y ch\u1ee7 ZYNOO.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 c\u1ea5u h\u00ecnh DNS ph\u1ea3i d\u1eabn kh\u00e1ch truy c\u1eadp \u0111\u1ebfn \u0111\u00fang n\u01a1i.<\/p>\n\n<h2 id=\"h-what-are-nameservers\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_ten_la_gi\"><\/span>M\u00e1y ch\u1ee7 t\u00ean l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">M\u00e1y ch\u1ee7 t\u00ean l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 DNS ch\u1ecbu tr\u00e1ch nhi\u1ec7m tr\u1ea3 l\u1eddi truy v\u1ea5n v\u1ec1 t\u00ean mi\u1ec1n.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi thi\u1ebft l\u1eadp d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef, nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 y\u00eau c\u1ea7u b\u1ea1n thay \u0111\u1ed5i m\u00e1y ch\u1ee7 t\u00ean c\u1ee7a t\u00ean mi\u1ec1n.<\/p>\n\n<p class=\"wp-block-paragraph\">Thao t\u00e1c n\u00e0y cho h\u1ec7 th\u1ed1ng DNS bi\u1ebft d\u1ecbch v\u1ee5 c\u00f3 th\u1ea9m quy\u1ec1n n\u00e0o ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 c\u00e1c b\u1ea3n ghi c\u1ee7a t\u00ean mi\u1ec1n.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, n\u1ebfu nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u00f3 d\u1ecbch v\u1ee5 qu\u1ea3n l\u00fd DNS, h\u1ecd c\u00f3 th\u1ec3 h\u01b0\u1edbng d\u1eabn b\u1ea1n s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 t\u00ean c\u1ee7a h\u1ecd.<\/p>\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, b\u1ea1n c\u00f3 th\u1ec3 gi\u1eef nh\u00e0 cung c\u1ea5p DNS hi\u1ec7n t\u1ea1i v\u00e0 c\u1eadp nh\u1eadt c\u00e1c b\u1ea3n ghi A, AAAA, CNAME ho\u1eb7c nh\u1eefng b\u1ea3n ghi kh\u00e1c theo y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Quan tr\u1ecdng:<\/strong> Vi\u1ec7c thay \u0111\u1ed5i m\u00e1y ch\u1ee7 t\u00ean c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn trang web v\u00e0 email c\u1ee7a b\u1ea1n. Tr\u01b0\u1edbc khi chuy\u1ec3n \u0111\u1ed5i, h\u00e3y \u0111\u1ea3m b\u1ea3o nh\u00e0 cung c\u1ea5p DNS m\u1edbi c\u00f3 \u0111\u1ea7y \u0111\u1ee7 c\u00e1c b\u1ea3n ghi c\u1ea7n thi\u1ebft.<\/p>\n\n<h2 id=\"h-what-is-dns-propagation\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lan_truyen_DNS_la_gi\"><\/span>Lan truy\u1ec1n DNS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">Lan truy\u1ec1n DNS l\u00e0 kho\u1ea3ng th\u1eddi gian c\u00e1c thay \u0111\u1ed5i DNS d\u1ea7n hi\u1ec3n th\u1ecb v\u1edbi nh\u1eefng tr\u00ecnh ph\u00e2n gi\u1ea3i v\u00e0 ng\u01b0\u1eddi d\u00f9ng kh\u00e1c nhau tr\u00ean internet.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi b\u1ea1n c\u1eadp nh\u1eadt m\u1ed9t b\u1ea3n ghi DNS, m\u1ed9t s\u1ed1 tr\u00ecnh ph\u00e2n gi\u1ea3i c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00e3 l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m tr\u01b0\u1edbc \u0111\u00f3 cho \u0111\u1ebfn khi c\u00e2u tr\u1ea3 l\u1eddi n\u00e0y h\u1ebft h\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">Qu\u00e1 tr\u00ecnh n\u00e0y ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a m\u1ed9t th\u00f4ng s\u1ed1 g\u1ecdi l\u00e0 <strong>TTL (Time to Live, th\u1eddi gian t\u1ed3n t\u1ea1i)<\/strong>, cho b\u1ed9 nh\u1edb \u0111\u1ec7m DNS bi\u1ebft m\u1ed9t b\u1ea3n ghi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u gi\u1eef trong bao l\u00e2u.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, TTL l\u00e0 3.600 gi\u00e2y t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t gi\u1edd.<\/p>\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, c\u00e1c thay \u0111\u1ed5i DNS kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng hi\u1ec3n th\u1ecb \u1edf m\u1ecdi n\u01a1i v\u00e0o \u0111\u00fang c\u00f9ng m\u1ed9t th\u1eddi \u0111i\u1ec3m. C\u00e1ch tr\u00ecnh ph\u00e2n gi\u1ea3i ho\u1ea1t \u0111\u1ed9ng, c\u00e1c b\u1ea3n ghi \u0111\u00e3 l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 nh\u1eefng thay \u0111\u1ed5i v\u1ec1 vi\u1ec7c \u1ee7y quy\u1ec1n m\u00e1y ch\u1ee7 t\u00ean \u0111\u1ec1u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh n\u00e0y.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu g\u1ea7n \u0111\u00e2y b\u1ea1n \u0111\u00e3 thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t DNS, h\u00e3y ch\u1edd b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1eadp nh\u1eadt tr\u01b0\u1edbc khi k\u1ebft lu\u1eadn r\u1eb1ng c\u00f3 s\u1ef1 c\u1ed1.<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><br \/>N\u1ebfu trang web c\u1ee7a b\u1ea1n kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c v\u00e0 b\u1ea1n th\u1ea5y l\u1ed7i <strong>\u201cDNS Server Not Responding\u201d<\/strong>, h\u00e3y l\u00e0m theo h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/zynoo.com\/blog\/vi\/dns-server-not-responding\/?utm_source=chatgpt.com\">c\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i<\/a> \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n v\u00e0 kh\u00f4i ph\u1ee5c k\u1ebft n\u1ed1i.<\/p>\n<\/div>\n\n<h2 id=\"h-how-to-check-your-dns-records\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_kiem_tra_ban_ghi_DNS\"><\/span>C\u00e1ch ki\u1ec3m tra b\u1ea3n ghi DNS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra th\u00f4ng tin DNS b\u1eb1ng c\u00e1c c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh c\u00f3 s\u1eb5n.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u00ean h\u1ec7 th\u1ed1ng Windows, macOS ho\u1eb7c Linux c\u00f3 <code>nslookup<\/code>, h\u00e3y m\u1edf c\u1eeda s\u1ed5 d\u00f2ng l\u1ec7nh v\u00e0 ch\u1ea1y:<\/p>\n\n<pre class=\"wp-block-code\"><code>nslookup example.com<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ki\u1ec3m tra b\u1ea3n ghi MX:<\/p>\n\n<pre class=\"wp-block-code\"><code>nslookup -type=MX example.com<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 ki\u1ec3m tra m\u00e1y ch\u1ee7 t\u00ean:<\/p>\n\n<pre class=\"wp-block-code\"><code>nslookup -type=NS example.com<\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Thay <code>example.com<\/code> b\u1eb1ng t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ec7nh n\u00e0y gi\u00fap b\u1ea1n xem tr\u00ecnh ph\u00e2n gi\u1ea3i \u0111ang \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh tr\u1ea3 v\u1ec1 nh\u1eefng th\u00f4ng tin DNS n\u00e0o.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu s\u1eed d\u1ee5ng cPanel, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd c\u00e1c b\u1ea3n ghi DNS \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 th\u00f4ng qua Zone Editor, v\u1edbi \u0111i\u1ec1u ki\u1ec7n v\u00f9ng DNS c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef t\u1ea1i \u0111\u00f3.<\/p>\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.bill.zynoo.com\/index.php\/knowledgebase\/4169\/How-to-add-A-Record-in-cPanel-using-DNS-Zone-Editor.html\">H\u01b0\u1edbng d\u1eabn th\u00eam b\u1ea3n ghi A trong cPanel thu\u1ed9c kho ki\u1ebfn th\u1ee9c c\u1ee7a ZYNOO<\/a> gi\u1ea3i th\u00edch c\u00e1c b\u01b0\u1edbc c\u01a1 b\u1ea3n.<\/p>\n\n<h2 id=\"h-what-happens-when-dns-isn-t-working\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dieu_gi_xay_ra_khi_DNS_khong_hoat_dong\"><\/span>\u0110i\u1ec1u g\u00ec x\u1ea3y ra khi DNS kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ed1 DNS c\u00f3 th\u1ec3 khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c trang web c\u1ee7a b\u1ea1n ngay c\u1ea3 khi m\u00e1y ch\u1ee7 web v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>B\u1ea3n ghi DNS kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c b\u1ecb thi\u1ebfu.<\/li>\n\n\n\n<li>M\u00e1y ch\u1ee7 t\u00ean tr\u1ecf \u0111\u1ebfn sai nh\u00e0 cung c\u1ea5p.<\/li>\n\n\n\n<li>\u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n \u0111\u00e3 h\u1ebft h\u1ea1n ho\u1eb7c b\u1ecb t\u1ea1m ng\u1eebng.<\/li>\n\n\n\n<li>Th\u00f4ng tin DNS trong b\u1ed9 nh\u1edb \u0111\u1ec7m ch\u01b0a h\u1ebft h\u1ea1n.<\/li>\n\n\n\n<li>S\u1ef1 c\u1ed1 t\u1ea1m th\u1eddi \u1edf tr\u00ecnh ph\u00e2n gi\u1ea3i ho\u1eb7c m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, l\u1ed7i tr\u00ecnh duy\u1ec7t <code>DNS_PROBE_FINISHED_NXDOMAIN<\/code> c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n khi DNS b\u00e1o r\u1eb1ng t\u00ean m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u kh\u00f4ng t\u1ed3n t\u1ea1i.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u1ea5u h\u00ecnh d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef, h\u00e3y ki\u1ec3m tra tr\u1ea1ng th\u00e1i \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, vi\u1ec7c \u1ee7y quy\u1ec1n m\u00e1y ch\u1ee7 t\u00ean v\u00e0 c\u00e1c b\u1ea3n ghi DNS li\u00ean quan.<\/p>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\">N\u1ebfu tr\u00ecnh duy\u1ec7t hi\u1ec3n th\u1ecb l\u1ed7i <strong>DNS_PROBE_FINISHED_NXDOMAIN<\/strong>, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u th\u00f4ng qua qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i DNS. Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 l\u00e0 b\u1ea3n ghi DNS kh\u00f4ng ch\u00ednh x\u00e1c, s\u1ef1 c\u1ed1 m\u00e1y ch\u1ee7 t\u00ean ho\u1eb7c th\u00f4ng tin DNS trong b\u1ed9 nh\u1edb \u0111\u1ec7m. H\u00e3y l\u00e0m theo h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/zynoo.com\/blog\/vi\/dns-probe-finished-nxdomain\/\">c\u00e1ch kh\u1eafc ph\u1ee5c DNS_PROBE_FINISHED_NXDOMAIN<\/a> \u0111\u1ec3 t\u00ecm v\u00e0 x\u1eed l\u00fd s\u1ef1 c\u1ed1 t\u1eebng b\u01b0\u1edbc.<\/p>\n<\/div>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793449917028\"><strong class=\"schema-faq-question\">DNS c\u00f3 gi\u1ed1ng \u0111\u1ecba ch\u1ec9 IP kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng. DNS l\u00e0 h\u1ec7 th\u1ed1ng \u0111\u1eb7t t\u00ean, c\u00f2n \u0111\u1ecba ch\u1ec9 IP x\u00e1c \u0111\u1ecbnh m\u1ed9t \u0111\u00edch \u0111\u1ebfn tr\u00ean m\u1ea1ng. DNS th\u01b0\u1eddng ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793449925044\"><strong class=\"schema-faq-question\">DNS c\u00f3 mi\u1ec5n ph\u00ed kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Ch\u1ee9c n\u0103ng ph\u00e2n gi\u1ea3i DNS th\u01b0\u1eddng \u0111\u01b0\u1ee3c bao g\u1ed3m trong d\u1ecbch v\u1ee5 k\u1ebft n\u1ed1i internet. Nhi\u1ec1u nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u0169ng cung c\u1ea5p s\u1eb5n t\u00ednh n\u0103ng qu\u1ea3n l\u00fd DNS, d\u00f9 m\u1ed9t s\u1ed1 d\u1ecbch v\u1ee5 DNS n\u00e2ng cao c\u00f3 c\u00e1c g\u00f3i tr\u1ea3 ph\u00ed.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793449943457\"><strong class=\"schema-faq-question\">Thay \u0111\u1ed5i DNS c\u00f3 l\u00e0m trang web c\u1ee7a t\u00f4i nhanh h\u01a1n kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng nh\u1ea5t thi\u1ebft. Tr\u00ecnh ph\u00e2n gi\u1ea3i nhanh h\u01a1n c\u00f3 th\u1ec3 r\u00fat ng\u1eafn th\u1eddi gian tra c\u1ee9u, nh\u01b0ng t\u1ed1c \u0111\u1ed9 t\u1ed5ng th\u1ec3 c\u1ee7a trang web c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o hi\u1ec7u su\u1ea5t m\u00e1y ch\u1ee7, b\u1ed9 nh\u1edb \u0111\u1ec7m, \u0111i\u1ec1u ki\u1ec7n m\u1ea1ng v\u00e0 m\u1ee9c \u0111\u1ed9 t\u1ed1i \u01b0u h\u00f3a trang.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793449957425\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 c\u00f3 t\u00ean mi\u1ec1n m\u00e0 kh\u00f4ng c\u1ea7n d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u0103ng k\u00fd v\u00e0 qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n m\u00e0 kh\u00f4ng c\u1ea7n l\u01b0u tr\u1eef trang web. N\u1ebfu mu\u1ed1n t\u00ean mi\u1ec1n hi\u1ec3n th\u1ecb m\u1ed9t trang web, b\u1ea1n s\u1ebd c\u1ea7n d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef ph\u00f9 h\u1ee3p ho\u1eb7c m\u1ed9t d\u1ecbch v\u1ee5 kh\u00e1c.<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">DNS l\u00e0 m\u1ed9t trong nh\u1eefng h\u1ec7 th\u1ed1ng n\u1ec1n t\u1ea3ng gi\u00fap internet d\u1ec5 s\u1eed d\u1ee5ng. H\u1ec7 th\u1ed1ng n\u00e0y k\u1ebft n\u1ed1i nh\u1eefng t\u00ean mi\u1ec1n quen thu\u1ed9c v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 v\u00e0 d\u1ecbch v\u1ee5 \u0111\u1eb1ng sau ch\u00fang.<\/p>\n\n<p class=\"wp-block-paragraph\">Hi\u1ec3u v\u1ec1 b\u1ea3n ghi DNS, m\u00e1y ch\u1ee7 t\u00ean v\u00e0 b\u1ed9 nh\u1edb \u0111\u1ec7m c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n c\u1ea5u h\u00ecnh d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef, qu\u1ea3n l\u00fd email v\u00e0 kh\u1eafc ph\u1ee5c c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn t\u00ean mi\u1ec1n.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n kh\u00f4ng c\u1ea7n n\u1eafm v\u1eefng m\u1ecdi chi ti\u1ebft k\u1ef9 thu\u1eadt, nh\u01b0ng hi\u1ec3u c\u00e1ch DNS ho\u1ea1t \u0111\u1ed9ng s\u1ebd gi\u00fap vi\u1ec7c qu\u1ea3n l\u00fd trang web d\u1ec5 d\u00e0ng h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) l\u00e0 h\u1ec7 th\u1ed1ng k\u1ebft n\u1ed1i t\u00ean mi\u1ec1n, ch\u1eb3ng h\u1ea1n nh\u01b0 example.com, v\u1edbi c\u00e1c \u0111\u1ecba ch\u1ec9 IP m\u00e0 m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ecm trang web v\u00e0 c\u00e1c d\u1ecbch v\u1ee5 internet kh\u00e1c. Thay v\u00ec ph\u1ea3i nh\u1edb m\u1ed9t \u0111\u1ecba ch\u1ec9 g\u1ed3m c\u00e1c con s\u1ed1, b\u1ea1n ch\u1ec9 c\u1ea7n nh\u1eadp t\u00ean trang web v\u00e0o [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4828,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[646],"tags":[],"class_list":["post-4827","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dich-vu-luu-tru-web"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>DNS l\u00e0 g\u00ec? C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 t\u1ea7m quan tr\u1ecdng<\/title>\n<meta name=\"description\" content=\"DNS l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u00e1ch DNS li\u00ean k\u1ebft t\u00ean mi\u1ec1n v\u1edbi trang web, c\u00e1ch b\u1ea3n ghi ho\u1ea1t \u0111\u1ed9ng v\u00e0 v\u00ec sao m\u00e1y ch\u1ee7 t\u00ean c\u00f9ng qu\u00e1 tr\u00ecnh lan truy\u1ec1n DNS l\u1ea1i quan tr\u1ecdng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zynoo.com\/blog\/vi\/what-is-dns\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS l\u00e0 g\u00ec? C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 t\u1ea7m quan tr\u1ecdng\" \/>\n<meta property=\"og:description\" content=\"DNS l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u c\u00e1ch DNS li\u00ean k\u1ebft t\u00ean mi\u1ec1n v\u1edbi trang web, c\u00e1ch b\u1ea3n ghi ho\u1ea1t \u0111\u1ed9ng v\u00e0 v\u00ec sao m\u00e1y ch\u1ee7 t\u00ean c\u00f9ng qu\u00e1 tr\u00ecnh lan truy\u1ec1n DNS l\u1ea1i quan tr\u1ecdng.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zynoo.com\/blog\/vi\/what-is-dns\/\" \/>\n<meta property=\"og:site_name\" content=\"ZYNOO Blog\" \/>\n<meta property=\"article:published_time\" content=\"2023-10-18T12:22:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-31T13:15:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2023\/10\/what-is-dns.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1672\" \/>\n\t<meta property=\"og:image:height\" content=\"941\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Jamie Collins\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jamie Collins\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/what-is-dns\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/what-is-dns\\\/\"},\"author\":{\"name\":\"Jamie Collins\",\"@id\":\"https:\\\/\\\/zynoo.com\\\/blog\\\/vi\\\/#\\\/schema\\\/person\\\/075b85b8be75fb370da34891a96e7eba\"},\"headline\":\"DNS l\u00e0 g\u00ec? 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N\u1ebfu mu\u1ed1n t\u00ean mi\u1ec1n hi\u1ec3n th\u1ecb m\u1ed9t trang web, b\u1ea1n s\u1ebd c\u1ea7n d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef ph\u00f9 h\u1ee3p ho\u1eb7c m\u1ed9t d\u1ecbch v\u1ee5 kh\u00e1c.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4827","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/comments?post=4827"}],"version-history":[{"count":1,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4827\/revisions"}],"predecessor-version":[{"id":4829,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/posts\/4827\/revisions\/4829"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/media\/4828"}],"wp:attachment":[{"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/media?parent=4827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/categories?post=4827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zynoo.com\/blog\/vi\/wp-json\/wp\/v2\/tags?post=4827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}