A Domain Name Server (DNS) is
an index of IP addresses and Web addresses. If you type a Web address into your browser,
a DNS server will find that name in its index and find the matching
IP address. Most ISPs provide a DNS server for speed and convenience. Since
your Service Provider may connect to the Internet with dynamic IP settings, it is likely
that the DNS server IP's are also provided dynamically. However, if there is a DNS server
that you would rather use, you need to specify the IP address here.