{"id":4633,"date":"2016-08-19T07:22:05","date_gmt":"2016-08-19T04:22:05","guid":{"rendered":"https:\/\/unihost.com\/help\/?p=4633"},"modified":"2023-01-19T13:58:05","modified_gmt":"2023-01-19T10:58:05","slug":"why-do-we-need-dns-servers","status":"publish","type":"post","link":"https:\/\/unihost.com\/help\/why-do-we-need-dns-servers\/","title":{"rendered":"Why do we need DNS servers?"},"content":{"rendered":"<p><span style=\"font-family: Ubuntu,sans-serif;\">To address the network nodes of Internet, the special digital combinations are widely used.<\/span><!--more--><\/p>\n<p><span style=\"font-family: Ubuntu,sans-serif;\"> These digital combinations are called IP addresses. DNS (Domain Name Service) is used to perform conversions between alphanumeric character and numeric addresses. An IP address can usually be written using four numbers in the decimal system, for instance: 192.168.16.34 or 87.46.253.167. DNS allows you to match the IP address and domain name, for instance: 77.88.21.8 = yandex.ru.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu,sans-serif;\">DNS servers (that respond on the Internet to requests about your domain or zone) are required in order to provide a proper functionning of the domains. To improve the reliability of a domain, there must be at least two DNS servers. The server, where full primary information about the domain zone is stored, is called Primary DNS. All other servers, where information on this zone are called Secondary DNS.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu,sans-serif;\">Information about the domain (also known as the zone file) contains several different types of records.<\/span><\/p>\n<p><span style=\"font-family: Ubuntu,sans-serif;\">The most important types of DNS records are the following:<\/span><\/p>\n<ul>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; \u0410 record (address record) connects IP address with host name, where a site is located.<\/span><\/li>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; NS record (name server record) points at the DNS server, where the records on this domain are located.<\/span><\/li>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; CNAME record (canonical name record). This record is used to redirect requests form one domain to another.<\/span><\/li>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; MX record (mail exchange record) points at the e-mail exchange server for the domain.<\/span><\/li>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; SOA record (Start of Authority record). This record indicates that one of the DNS servers is Primary one; the record also contains contact information of the one responsible for this zone, timing of interaction between DNS servers and ca\u0441hing of information by the zone.<\/span><\/li>\n<li><span style=\"font-family: Ubuntu,sans-serif;\">&#8211; SRV record(server selection record) points at servers addresses for different services. It is usually used for Jabber and Active Directory.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>To address the network nodes of Internet, the special digital combinations are widely used.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[157],"tags":[178],"class_list":["post-4633","post","type-post","status-publish","format-standard","hentry","category-domains","tag-domain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Why do we need DNS servers? - Unihost.FAQ<\/title>\n<meta name=\"description\" content=\"DNS (Domain Name Service) is used to perform conversions between alphanumeric character and numeric addresses. - Unihost.FAQ\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unihost.com\/help\/why-do-we-need-dns-servers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why do we need DNS servers? 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