Short for Domain Name System or Domain Name Service, a DNS is an Internet or network server that helps to point domain names or hostnames to their associated Internet Protocol address. It was introduced by Paul Mockapetris and Jon Postel in 1983. Without a server to resolve a domain name or the proper rights, users would have to know the IP address of each of the web pages or computers you wanted to access.

Note: If a domain name is not found within a local database, the server may query other domain servers to obtain its address.

Tip: DNS uses port 53.

How does it work?

When a user wants to visit Computer Hope, they would type "computerhope.com" into the address bar of their browser. Once that domain name has been entered, it is looked up on a Domain Name System where it is translated into an IP address that is more easily interpreted by a computer, e.g. Using that IP address, your computer can then locate the Computer Hope web page and forward that information to your browser.

Related pages

Also see: A record, CNAME, Database, DNS hijacking, DNS record, Domain, Domain namespace, Hosts file, MX record, Nameserver, Network terms, Port, rDNS, SOA, WINS