what is a domain name?
A domain name is an identification string that defines a realm of administrative autonomy, authority or control within the Internet. Domain names are formed by the rules and procedures of the Domain Name System (DNS). Any name registered in the DNS is a domain name.Domain names can also be thought of as a location where certain information or activities can be found. Domain names are used in various networking contexts and application-specific naming and addressing purposes. fictitious domain name is a domain name used in a work of fiction or popular culture to refer to a domain that does not actually exist, often with invalid or unofficial top-level domains such as  .web , a usage exactly analogous to the dummy 555 telephone number prefix used in film and other media.