{"id":527,"date":"2020-10-16T08:30:00","date_gmt":"2020-10-16T11:30:00","guid":{"rendered":"https:\/\/www.lumiun.com\/blog\/?p=527"},"modified":"2023-05-11T14:51:49","modified_gmt":"2023-05-11T17:51:49","slug":"entenda-o-que-e-e-como-o-dns-facilita-o-uso-da-internet","status":"publish","type":"post","link":"https:\/\/www.lumiun.com\/blog\/entenda-o-que-e-e-como-o-dns-facilita-o-uso-da-internet\/","title":{"rendered":"Entenda o que \u00e9 e como o DNS facilita o uso da Internet"},"content":{"rendered":"<p>O DNS, do ingl\u00eas Domain Name System (Sistema de Nomes de Dom\u00ednios), de forma t\u00e9cnica, \u00e9 um servi\u00e7o hier\u00e1rquico e distribu\u00eddo para computadores, servi\u00e7os ou qualquer recurso conectado \u00e0 Internet que funciona como um sistema de tradu\u00e7\u00e3o de nomes de dom\u00ednios (hosts) para endere\u00e7os IP. De forma resumida, \u00e9 atrav\u00e9s do DNS que podemos digitar apenas um nome como www.lumiun.com na barra de endere\u00e7os do navegador para acessar o site do Lumiun, n\u00e3o sendo necess\u00e1rio informar um n\u00famero IP (200.154.39.214), que \u00e9 uma combina\u00e7\u00e3o num\u00e9rica de dif\u00edcil memoriza\u00e7\u00e3o.<\/p>\n<h2 id=\"como-o-dns-funciona\">Como o DNS\u00a0funciona?<\/h2>\n<p><picture><source srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2.jpg.webp 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-500x146.jpg.webp 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-1140x333.jpg.webp 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-768x224.jpg.webp 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-380x111.jpg.webp 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-800x234.jpg.webp 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-1160x339.jpg.webp 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignnone wp-image-7563 size-full webpexpress-processed\" src=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2.jpg\" alt=\"como funciona o dns\" width=\"1201\" height=\"351\" srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2.jpg 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-500x146.jpg 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-1140x333.jpg 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-768x224.jpg 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-380x111.jpg 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-800x234.jpg 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet2-1160x339.jpg 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\"><\/picture><\/p>\n<p>\u00c9 poss\u00edvel acessar qualquer site na Internet pelo seu nome de dom\u00ednio (lumiun.com) ou pelo endere\u00e7o IP (200.154.39.214) do servidor onde esse site est\u00e1 hospedado. Para que n\u00e3o seja necess\u00e1rio informar a combina\u00e7\u00e3o de n\u00fameros IP na barra de endere\u00e7os do navegador sempre que voc\u00ea informa o endere\u00e7o de um site que queira acessar, o DNS faz o trabalho de traduzir o nome do dom\u00ednio que comp\u00f5em a URL, para o endere\u00e7o IP do servidor do respectivo site, direcionando o acesso a esse servidor.<\/p>\n<p>Imagine sua lista de contatos no seu celular. Para ligar para algu\u00e9m, basta selecionar o nome do contato, a partir disso o celular traduz esse nome para o n\u00famero de telefone e faz a liga\u00e7\u00e3o. O DNS funciona de forma semelhante.<\/p>\n<p>Cada servidor na Internet possui um endere\u00e7o IP \u00fanico, portanto, cada dom\u00ednio \u00e9 direcionado para um IP espec\u00edfico. Por isso, n\u00e3o \u00e9 poss\u00edvel existir\u00a0dois sites diferentes com endere\u00e7os (URLs) iguais.<\/p>\n<p>Existem 13 servidores DNS raiz em todo o mundo e sem eles a Internet n\u00e3o funcionaria. Destes, dez est\u00e3o localizados nos Estados Unidos, um na \u00c1sia e dois na Europa. Para ampliar a base instalada destes servidores e tornar o servi\u00e7o mais r\u00e1pido, existem r\u00e9plicas localizadas por todo o mundo, inclusive no Brasil.<\/p>\n<h2 id=\"quem-gerencia-o-dns\">Quem gerencia o DNS?<\/h2>\n<p><picture><source srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3.jpg.webp 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-500x146.jpg.webp 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-1140x333.jpg.webp 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-768x224.jpg.webp 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-380x111.jpg.webp 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-800x234.jpg.webp 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-1160x339.jpg.webp 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignnone wp-image-7565 size-full webpexpress-processed\" src=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3.jpg\" alt=\"como funciona o dns\" width=\"1201\" height=\"351\" srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3.jpg 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-500x146.jpg 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-1140x333.jpg 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-768x224.jpg 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-380x111.jpg 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-800x234.jpg 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet3-1160x339.jpg 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\"><\/picture><\/p>\n<p>Para que o sistema de endere\u00e7os IP e DNS funcione corretamente, \u00e9 necess\u00e1rio uma coordena\u00e7\u00e3o global, pois \u00e9 necess\u00e1rio garantir que n\u00e3o seja poss\u00edvel atribuir endere\u00e7os IP de maneira descentralizada e tamb\u00e9m que cada endere\u00e7o IP identifique um \u00fanico servidor ou equipamento em todo o mundo.<\/p>\n<p>A organiza\u00e7\u00e3o respons\u00e1vel por gerenciar\u00a0nomes de dom\u00ednios e endere\u00e7os IP em todo mundo \u00e9 o\u00a0<a href=\"https:\/\/www.icann.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">ICANN<\/a> (acr\u00f4nimo em ingl\u00eas para Corpora\u00e7\u00e3o da Internet para Atribui\u00e7\u00e3o de Nomes e N\u00fameros). \u00c9 responsabilidade dessa entidade manter todos os sites registrados e funcionando na internet.<\/p>\n<p><a href=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/2015\/09\/dns.png\"><picture><source srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/2015\/09\/dns.png.webp 350w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/2015\/09\/dns-300x238.png.webp 300w\" sizes=\"(max-width: 297px) 100vw, 297px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignright wp-image-534 webpexpress-processed\" src=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/2015\/09\/dns.png\" alt=\"hierarquia dns\" width=\"297\" height=\"236\" srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/2015\/09\/dns.png 350w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/2015\/09\/dns-300x238.png 300w\" sizes=\"(max-width: 297px) 100vw, 297px\"><\/picture><\/a>Os nomes de dom\u00ednios s\u00e3o gerenciados de forma hier\u00e1rquica e distribu\u00edda, e a autoridade sobre os dom\u00ednios \u00e9 delegada de acordo com a estrutura hier\u00e1rquica, geralmente usado ou reservado para um pa\u00eds. A imagem ao lado exemplifica\u00a0essa estrutura de nomes, onde o &#8220;.br&#8221; \u00e9 o <em>dom\u00ednio de topo de c\u00f3digo de pa\u00eds<\/em> que pertence e identifica o Brasil.<\/p>\n<p>No Brasil, os endere\u00e7os de internet s\u00e3o gerenciados pelo\u00a0<a href=\"http:\/\/nic.br\/\" target=\"_blank\" rel=\"noopener noreferrer\">NICBR &#8211; N\u00facleo de Informa\u00e7\u00e3o e Coordena\u00e7\u00e3o do PONTO BR<\/a>. Servi\u00e7os e informa\u00e7\u00f5es sobre dom\u00ednios, consulta\u00a0de endere\u00e7os e registros podem ser realizadas\u00a0no <a href=\"http:\/\/registro.br\/\" target=\"_blank\" rel=\"noopener noreferrer\">Registro.BR<\/a>. O Brasil t\u00eam at\u00e9 agora (15\/10\/2020) com <strong class=\"font-1 font-bold txt-orange\" data-v-440be829=\"\">4.468.898<\/strong> dom\u00ednios registrados. Estat\u00edsticas atualizadas est\u00e3o dispon\u00edveis em <a href=\"http:\/\/registro.br\/estatisticas.html\" target=\"_blank\" rel=\"noopener noreferrer\">www.registro.br\/estatisticas.html<\/a>.<\/p>\n<h2 id=\"como-utilizar-o-dns\">Como utilizar o DNS?<\/h2>\n<p><picture><source srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4.jpg.webp 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-500x146.jpg.webp 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-1140x333.jpg.webp 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-768x224.jpg.webp 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-380x111.jpg.webp 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-800x234.jpg.webp 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/webp-express\/webp-images\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-1160x339.jpg.webp 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignnone wp-image-7567 size-full webpexpress-processed\" src=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4.jpg\" alt=\"como funciona o dns\" width=\"1201\" height=\"351\" srcset=\"https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4.jpg 1201w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-500x146.jpg 500w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-1140x333.jpg 1140w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-768x224.jpg 768w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-380x111.jpg 380w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-800x234.jpg 800w, https:\/\/www.lumiun.com\/blog\/wp-content\/uploads\/Entenda-o-que-e-e-como-o-DNS-facilita-o-uso-da-Internet4-1160x339.jpg 1160w\" sizes=\"(max-width: 1201px) 100vw, 1201px\"><\/picture><\/p>\n<p>Todo equipamento conectado em rede e na Internet necessita de um servidor DNS para se comunicar na rede e acessar a Internet. A defini\u00e7\u00e3o do servidor\u00a0DNS faz parte das configura\u00e7\u00f5es b\u00e1sicas da rede e do computador, geralmente s\u00e3o utilizados servi\u00e7os de DNS conhecidos, como o DNS do Google (8.8.8.8) ou DNS dos pr\u00f3prios provedores de Internet.<\/p>\n<p>O <a href=\"https:\/\/www.lumiun.com\/box\">Lumiun Box<\/a> e <a href=\"https:\/\/lumiundns.com\/pt\">Lumiun DNS<\/a> s\u00e3o servi\u00e7os que utilizam o sistema de DNS para oferecer seguran\u00e7a e <a href=\"https:\/\/comobloquearsite.com\/\">controle de acesso a Internet<\/a>, filtrando quais dom\u00ednios podem ou n\u00e3o ser acessados, conforme sua classifica\u00e7\u00e3o indicativa, melhorando a produtividade nas empresas e tamb\u00e9m, aumentando a seguran\u00e7a dos dados. Voc\u00ea pode ver com mais detalhes <a href=\"https:\/\/www.lumiun.com\/como-funciona\" target=\"_blank\" rel=\"noopener noreferrer\">como funciona<\/a> e os benef\u00edcios\u00a0e vantagens de controlar o acesso \u00e0 internet em ambientes corporativos.<\/p>\n","protected":false},"excerpt":{"rendered":"O DNS, do ingl\u00eas Domain Name System (Sistema de Nomes de Dom\u00ednios), de forma t\u00e9cnica, \u00e9 um servi\u00e7o&hellip;\n","protected":false},"author":11,"featured_media":7562,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"content-type":"","footnotes":""},"categories":[4],"tags":[39,5,21],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Entenda o que \u00e9 e como o DNS facilita o uso da Internet | Lumiun Blog<\/title>\n<meta name=\"description\" content=\"Saiba neste artigo, o que \u00e9 DNS e entenda como ele funciona e facilitando 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