{"id":9200,"date":"2026-02-11T18:34:42","date_gmt":"2026-02-11T17:34:42","guid":{"rendered":"https:\/\/www.datasystem.es\/nuevo\/?p=9200"},"modified":"2026-02-11T18:34:43","modified_gmt":"2026-02-11T17:34:43","slug":"que-es-dns-y-como-funciona-explicado-facil","status":"publish","type":"post","link":"https:\/\/www.datasystem.es\/nuevo\/que-es-dns-y-como-funciona-explicado-facil\/","title":{"rendered":"Qu\u00e9 es DNS y c\u00f3mo funciona (explicado f\u00e1cil)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">DNS es el sistema que traduce nombres como \u201cejemplo.com\u201d a direcciones IP para que tu navegador sepa a qu\u00e9 servidor conectarse.<a rel=\"noreferrer noopener\" target=\"_blank\" href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\"><\/a>\u200b<br>En otras palabras: t\u00fa recuerdas nombres; Internet necesita direcciones.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quien-participa-cuando-preguntas-por-un-dominio\">Qui\u00e9n participa cuando \u201cpreguntas\u201d por un dominio<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-quien-participa-cuando-preguntas-por-un-dominio-en-una-resolucion-tipica-aparecen-el-resolutor-recursivo-los-servidores-raiz-root-los-servidores-del-tld-como-com-o-es-y-el-servidor-autoritativo-del-dominio-la-idea-clave-es-que-el-resolutor-recursivo-hace-consultas-en-tu-nombre-mientras-que-el-autoritativo-es-el-que-tiene-la-respuesta-oficial-del-dominio\">En una resoluci\u00f3n t\u00edpica aparecen: el resolutor recursivo, los servidores ra\u00edz (root), los servidores del TLD (como .com o .es) y el servidor autoritativo del dominio.<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<br>La idea clave es que el resolutor recursivo hace consultas en tu nombre, mientras que el autoritativo es el que tiene la respuesta oficial del dominio.<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-paso-a-paso-que-ocurre-cuando-escribes-una-web\">Paso a paso: qu\u00e9 ocurre cuando escribes una web<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Tu dispositivo pregunta a un DNS recursivo (normalmente el de tu operador o uno p\u00fablico configurado).<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Si el recursivo no tiene la respuesta guardada, consulta a un servidor ra\u00edz, que le orienta hacia el TLD adecuado.<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Luego consulta al TLD, que le indica cu\u00e1les son los servidores autoritativos de ese dominio.<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>Finalmente pregunta al autoritativo, que devuelve el registro necesario (por ejemplo, una IP o un alias).<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-por-que-a-veces-tarda-en-actualizarse-un-cambio\">Por qu\u00e9 a veces tarda en \u201cactualizarse\u201d un cambio<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS usa cach\u00e9: el resolutor guarda respuestas durante un tiempo (TTL) para acelerar consultas repetidas.<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<br>Por eso, si cambias registros, distintos resolutores pueden tardar en ver el cambio hasta que expire su cach\u00e9 seg\u00fan el TTL.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-registros-dns-comunes-los-que-veras-en-cualquier-panel\">Registros DNS comunes (los que ver\u00e1s en cualquier panel)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A: apunta un nombre a una IPv4.<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>AAAA: apunta un nombre a una IPv6.<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>CNAME: crea un alias, un nombre apunta a otro nombre.<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>MX: indica a qu\u00e9 servidores debe ir el correo del dominio.<a href=\"https:\/\/dn.org\/how-dns-queries-work-recursive-vs-authoritative-servers\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>TXT: se usa para verificaciones y pol\u00edticas (muy com\u00fan en configuraciones de correo y servicios).<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"512\" height=\"512\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/02\/image-7.png.webp\" alt=\"DNS\" class=\"wp-image-9214 lazyload\" data-srcset=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/02\/image-7.png.webp 512w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/02\/image-7-300x300.png.webp 300w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/02\/image-7-150x150.png.webp 150w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/02\/image-7-12x12.png 12w\" data-sizes=\"(max-width: 512px) 100vw, 512px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 512px; --smush-placeholder-aspect-ratio: 512\/512;\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-problemas-tipicos-y-diagnostico-rapido\">Problemas t\u00edpicos y diagn\u00f3stico r\u00e1pido<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-problemas-tipicos-y-diagnostico-rapido\">Si una web no carga pero otras s\u00ed, puede ser un problema de DNS (cach\u00e9, bloqueo, configuraci\u00f3n equivocada o propagaci\u00f3n).<br>Una prueba \u00fatil es comparar respuestas usando herramientas como nslookup\/dig o cambiando temporalmente el resolutor para ver si el fallo depende del DNS o del servidor web.<br>Si acabas de hacer cambios, ten presente el TTL: \u201cno se ve a\u00fan\u201d muchas veces significa \u201calguna cach\u00e9 todav\u00eda no ha caducado\u201d.<a href=\"https:\/\/www.digicert.com\/faq\/dns\/recursive-and-authoritative-dns-differences\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-mini-faq\">Mini-FAQ<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00bfDNS es lo mismo que Internet? No: DNS es el sistema de nombres; la conexi\u00f3n y los servicios web van por otros protocolos.<a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-server-types\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>\u200b<\/li>\n\n\n\n<li>\u00bfUsar un DNS p\u00fablico siempre es mejor? Depende: puede cambiar latencia, filtrado, privacidad y fiabilidad seg\u00fan tu zona y tu operador.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1080 \/ 1080;\" width=\"1080\" controls src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/02\/Dns.mp4\"><\/video><\/figure>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.datasystem.es\/nuevo\/\" style=\"border-top-left-radius:64px;border-top-right-radius:64px;border-bottom-left-radius:64px;border-bottom-right-radius:64px;background-color:#267e01\">Vis\u00edtanos!<\/a><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-otros-articulos-interesantes\">Otros art\u00edculos interesantes<\/h3>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-8f761849 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-reparacion-de-ordenadores-a-domicilio-data-system wp-block-embed-reparacion-de-ordenadores-a-domicilio-data-system\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"z0nFlXZLE1\"><a href=\"https:\/\/www.datasystem.es\/nuevo\/pc-lento-acelerar-ssd-ram\/\">PC lento: gu\u00eda pr\u00e1ctica 2026 para acelerar tu ordenador (SSD + RAM)<\/a><\/blockquote><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u00abPC lento: gu\u00eda pr\u00e1ctica 2026 para acelerar tu ordenador (SSD + RAM)\u00bb \u2014 Reparacion  de ordenadores a domicilio - Data System\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/pc-lento-acelerar-ssd-ram\/embed\/#?secret=cX0FhOqU0v#?secret=z0nFlXZLE1\" data-secret=\"z0nFlXZLE1\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-reparacion-de-ordenadores-a-domicilio-data-system wp-block-embed-reparacion-de-ordenadores-a-domicilio-data-system\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"ThEVAIryJJ\"><a href=\"https:\/\/www.datasystem.es\/nuevo\/asegurar-wifi-casa-ajustes-router\/\">C\u00f3mo asegurar tu Wi\u2011Fi en casa: 7 ajustes clave en el router (2026)<\/a><\/blockquote><iframe class=\"wp-embedded-content lazyload\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; 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visibility: hidden;\" title=\"\u00abNAS en casa vs nube: qu\u00e9 te conviene en 2026 (y por qu\u00e9)\u00bb \u2014 Reparacion  de ordenadores a domicilio - Data System\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/nas-en-casa-vs-en-la-nube\/embed\/#?secret=SFl7vHhFuT#?secret=xmxP8P9mch\" data-secret=\"xmxP8P9mch\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.tiktok.com\/@datasystem\" rel=\"Tiktok de datasystem\"><img decoding=\"async\" width=\"350\" height=\"350\" data-id=\"8970\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png.png\" alt=\"Tiktok\" class=\"wp-image-8970 lazyload\" data-srcset=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png.png 350w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-300x300.png.webp 300w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-150x150.png.webp 150w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-12x12.png.webp 12w\" data-sizes=\"(max-width: 350px) 100vw, 350px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 350px; --smush-placeholder-aspect-ratio: 350\/350;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.instagram.com\/datasystem.es\/\" rel=\"Red social de datasystem\"><img decoding=\"async\" width=\"350\" height=\"350\" data-id=\"8972\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-1.png.webp\" alt=\"Instagram\" class=\"wp-image-8972 lazyload\" data-srcset=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-1.png.webp 350w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-1-300x300.png.webp 300w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-1-150x150.png.webp 150w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/01\/tiktok-logo-tikok-icon-transparent-tikok-app-logo-free-png-1-12x12.png 12w\" data-sizes=\"(max-width: 350px) 100vw, 350px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 350px; --smush-placeholder-aspect-ratio: 350\/350;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/x.com\/datasystemm\" rel=\"Twitter de datasystem\"><img decoding=\"async\" width=\"320\" height=\"320\" data-id=\"8974\" data-src=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/twitter-x-logo-png_seeklogo-492396-1.png.webp\" alt=\"Twitter\" class=\"wp-image-8974 lazyload\" data-srcset=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/twitter-x-logo-png_seeklogo-492396-1.png.webp 320w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/twitter-x-logo-png_seeklogo-492396-1-300x300.png.webp 300w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/smush-webp\/2026\/01\/twitter-x-logo-png_seeklogo-492396-1-150x150.png.webp 150w, https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/01\/twitter-x-logo-png_seeklogo-492396-1-12x12.png 12w\" data-sizes=\"(max-width: 320px) 100vw, 320px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 320px; --smush-placeholder-aspect-ratio: 320\/320;\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>DNS es el sistema que traduce nombres como \u201cejemplo.com\u201d a direcciones IP para que tu navegador sepa a qu\u00e9 servidor conectarse.\u200bEn otras palabras: t\u00fa recuerdas nombres; Internet necesita direcciones. Qui\u00e9n participa cuando \u201cpreguntas\u201d por un dominio En una resoluci\u00f3n t\u00edpica aparecen: el resolutor recursivo, los servidores ra\u00edz (root), los servidores del TLD (como .com o [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":9219,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92,179],"tags":[114,104,10],"class_list":["post-9200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-consejos-rapidos","category-consejos-sobre-software","tag-guia","tag-software","tag-tips"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Qu\u00e9 es DNS y c\u00f3mo funciona (explicado f\u00e1cil) - SPInformatica<\/title>\n<meta name=\"description\" content=\"Descubre qu\u00e9 es DNS y c\u00f3mo resuelve dominios: resolutor recursivo, root\/TLD, servidor autoritativo, cach\u00e9 y registros A, CNAME y m\u00e1s.\" \/>\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.datasystem.es\/nuevo\/que-es-dns-y-como-funciona-explicado-facil\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu\u00e9 es DNS y c\u00f3mo funciona (explicado f\u00e1cil)\" \/>\n<meta property=\"og:description\" content=\"Descubre qu\u00e9 es DNS y c\u00f3mo resuelve dominios: resolutor recursivo, root\/TLD, servidor autoritativo, cach\u00e9 y registros A, CNAME y m\u00e1s.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.datasystem.es\/nuevo\/que-es-dns-y-como-funciona-explicado-facil\/\" \/>\n<meta property=\"og:site_name\" content=\"SPInformatica\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/m.facebook.com\/informaticayelectronicamadrid\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-11T17:34:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-11T17:34:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.datasystem.es\/nuevo\/wp-content\/uploads\/2026\/02\/Green-and-White-Modern-The-Circular-Economy-Presentation-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Tierno Galvan - 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