Companies have created brands based on generic names, and such generic domain names may be valuable. Some examples of generic names are, , and. Organizations can choose a domain name that corresponds to their name, helping Internet users to reach them easily.Ī generic domain is a name that defines a general category, rather than a specific or personal instance, for example, the name of an industry, rather than a company name. Such a move usually requires changing the IP address of a resource and the corresponding translation of this IP address to and from its domain name.ĭomain names are used to establish a unique identity. This abstraction allows any resource to be moved to a different physical location in the address topology of the network, globally or locally in an intranet. Such examples are the realm identifiers used in the Session Initiation Protocol (SIP), the Domain Keys used to verify DNS domains in e-mail systems, and in many other Uniform Resource Identifiers (URIs).Īn important function of domain names is to provide easily recognizable and memorizable names to numerically addressed Internet resources. Hostnames appear as a component in Uniform Resource Locators (URLs) for Internet resources such as websites (e.g., en.).ĭomain names are also used as simple identification labels to indicate ownership or control of a resource. The term hostname is also used for the leaf labels in the domain name system, usually without further subordinate domain name space. Individual Internet host computers use domain names as host identifiers, also called hostnames. A domain name may represent entire collections of such resources or individual instances. Purposeĭomain names serve to identify Internet resources, such as computers, networks, and services, with a text-based label that is easier to memorize than the numerical addresses used in the Internet protocols. Labels in the Domain Name System are case-insensitive, and may therefore be written in any desired capitalization method, but most commonly domain names are written in lowercase in technical contexts. The registration of a second- or third-level domain name is usually administered by a domain name registrar who sell its services to the public.Ī fully qualified domain name (FQDN) is a domain name that is completely specified with all labels in the hierarchy of the DNS, having no parts omitted. Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users who wish to connect local area networks to the Internet, create other publicly accessible Internet resources or run web sites. The first-level set of domain names are the top-level domains (TLDs), including the generic top-level domains (gTLDs), such as the prominent domains com, info, net, edu, and org, and the country code top-level domains (ccTLDs). Domain names are organized in subordinate levels (subdomains) of the DNS root domain, which is nameless. Any name registered in the DNS is a domain name. In general, a domain name identifies a network domain or an Internet Protocol (IP) resource, such as a personal computer used to access the Internet, or a server computer.ĭomain names are formed by the rules and procedures of the Domain Name System (DNS). Domain names are used in various networking contexts and for application-specific naming and addressing purposes. As of 2017, 330.6 million domain names had been registered. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. In the Internet, a domain name is a string that identifies a realm of administrative autonomy, authority or control. For other uses, see Domain (disambiguation). This article is about domain names in the Internet.
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