Domain

It is a unique name that identifies a website on the Internet. An important function of the domain is to provide easily recognizable and memorable names to Internet resources addressed numerically. This abstraction allows any resource to be moved to a different physical location in the address topology of the network, globally or locally on an intranet. Such a move usually requires changing the IP address of a resource and the corresponding translation of this IP address to and from your domain name. The main purpose of the Internet domain is to translate the IP addresses of each asset in the network. The domain is used 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 Internet protocols. It can represent complete collections of those resources or individual instances. Individual Internet host computers use domain names as host identifiers, also called host names. The term host name is also used for leaf labels in the domain name system, usually without more subordinate domain name space. The domain is also used as a simple identification tag to indicate the ownership or control of a resource. Some examples are the realm identifiers used in the Session Initiation Protocol, the domain keys used to verify DNS domains in email systems and in many other uniform resource identifiers.