A server is used to host the software and data needed to match IP addresses and domain names of computers under its authority and Internet resources.

When the URL on a web page is entered into a browser, a name server must render a corresponding IP address so that the browser can establish a direct connection to the site. For a domain name to work on the Internet, at least one name server must be configured and registered in the registrar’s database and the zone file.

There are three types DNS servers, top, secondary and recursive.