A domain name is an identification string that defines a realm of administrative autonomy, authority, or control on the Internet. DNS[Domain Name System] is the most recognized system for assigning addresses to Internet web servers. Domain names are used to identify one or more IP addresses. For e.g. the domain name microsoft.com represents about a dozen IP addresses. Domain names are used in URLs to identify particular Web pages. Technically, any name registered in the DNS is a domain name. Domain registration is the process of acquiring a domain name from a domain name registrar. Domain names serve as humanly memorable names for Internet participants, like computers, networks, and services. A domain name represents an Internet Protocol resource.