The Internet's Domain Name Service (DNS) provides
a way to map a numerical IP address to an alphanumeric name. For
example, A Company Connection Online is currently at IP address
184.108.40.206, and has a DNS name of "www.xyz.com".
As with every computer on the Internet, your computer, to communicate
with others on the Internet, requires an IP address. DNS names
are optional, but highly encouraged for certain forms of authentication,
and to ease of management of large networks.