Use in web site hosting

Use in web site hosting

A domain name is a component of a Uniform Resource Locator (URL) used to access web sites, for example:

URL: http://www.example.net/index.html
Top-level domain name: .net
Second-level domain name: example.net
Host name: www.example.net

A domain name may point to multiple IP addresses to provide server redundancy for the services delivered. This is used for large, popular web sites. More commonly, however, one server at a given IP address may also host multiple web sites in different domains. Such address overloading enables virtual web hosting commonly used by large web hosting services to conserve IP address space. It is possible through a feature in the HTTP version 1.1 protocol, but not in HTTP 1.0, which requires that a request identifies the domain name being referenced.