The Domain Name System distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative name servers for each domain. Authoritative name servers are assigned to be responsible for their particular domains, and in turn can assign other authoritative name servers for their sub-domains. This mechanism has made the DNS distributed, fault tolerant, and helped avoid the need for a single central register to be continually consulted and updated.

In general, the Domain Name System also stores other types of information, such as the list of mail servers that accept email for a given Internet domain. By providing a worldwide, distributed keyword-based redirection service, the Domain Name System is an essential component of the functionality of the Internet.

Other identifiers such as RFID tags, UPC codes, International characters in email addresses and host names, and a variety of other identifiers could all potentially utilize DNS.[1]

The Domain Name System also defines the technical underpinnings of the functionality of this database service. For this purpose it defines the DNS protocol, a detailed specification of the data structures and communication exchanges used in DNS, as part of the Internet Protocol Suite (TCP/IP). The DNS protocol was developed and defined in the early 1980s and published by the Internet Engineering Task Force (cf. History).

Регистрация домена

Регистрация домена — первый шаг к запуску долгосрочного интернет-проекта.
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Сколько времени регистрируется домен?

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•.ru, .su регистрируются до 6—12 часов,
•.com и другие западные домены — до 3—6 часов,
•.msk.ru, .spb.ru и другие бесплатные региональные домены — до нескольких суток.
•.net.ru, .org.ru и .pp.ru — до 2-х месяцев.

Размещение домена (сайта). Хостинг.

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