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Definition[]

A host name (also spelled hostname) is a label that is assigned to a device connected to a computer network and that is used to identify the device in various forms of electronic communication such as the World Wide Web, e-mail or Usenet. Host names may be simple names consisting of a single word or phrase, or they may have appended the name of a Domain Name System (DNS) domain, separated from the host specific label by a period (dot). In the latter form, a host name is also called a domain name. If the domain name is completely specified including a top-level domain of the Internet, the host name is said to be a fully qualified domain name (FQDN).


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