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2. Domain name - Wikipedia

   en.wikipedia.org/wiki/Domain_name

   These are the names directly to the left of .com, .net, and the other top-level domains. As an example, in the domain example.co.uk, co is the second-level domain. Next are third-level domains, which are written immediately to the left of a second-level domain. There can be fourth- and fifth-level domains, and so on, with virtually no limitation.

3. List of Internet top-level domains - Wikipedia

   en.wikipedia.org/wiki/List_of_Internet_top-level...

   This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet.A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [1]

4. Top-level domain - Wikipedia

   en.wikipedia.org/wiki/Top-level_domain

   IDN ccTLDs are an application of the internationalized domain name (IDN) system to top-level Internet domains assigned to countries, or independent geographic regions. ICANN started to accept applications for IDN ccTLDs in November 2009, [6] and installed the first set into the Domain Names System in May 2010. The first set was a group of ...

5. Domain Name System - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System

   Domain name resolvers determine the domain name servers responsible for the domain name in question by a sequence of queries starting with the right-most (top-level) domain label. A DNS resolver that implements the iterative approach mandated by RFC 1034; in this case, the resolver consults three name servers to resolve the fully qualified ...

6. Fully qualified domain name - Wikipedia

   en.wikipedia.org/wiki/Fully_qualified_domain_name

   A fully qualified domain name (FQDN), sometimes also called an absolute domain name, [1] is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone . [ 2 ]

7. Country code top-level domain - Wikipedia

   en.wikipedia.org/wiki/Country_code_top-level_domain

   An internationalized country code top-level domain (IDN ccTLD) is a top-level domain with a specially encoded domain name that is displayed in an end user application, such as a web browser, in its native language script or a non-alphabetic writing system, such as Latin script (.us, .uk and .br), Indic script (.