The Domain Name System is an Internet naming system that makes it possible to assign domain names to groups of Internet resources and users, independent of each entity’s physical location. Domain names are easier to remember than IP addresses such as 207.75.188.166 (IPv4) or 2001:db6:1f70::999:de8:7648:6e8 (IPv6). Internet users use domain names to recite meaningful Uniform Resource Locators (URLs) and e-mail addresses.

The Domain Name System distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating name servers for each domain. Name servers are responsible for their particular domains. The are DNS distributed and fault tolerant. This makes possible for the WWW to avoid keeping everything in a single central register which has to be continually consulted and updated.

Domain Name System also stores information about the list of mail servers that accept email for web addresses. Domain Name System is a very important component of the Internet as we know it because it provides a distributed keyword-based redirection service.

Reseller hosting is form of virtual hosting in which the account holder maintains a Master Shared Hosting Account, which has a special interface that allows one to create and manage a number of Shared accounts through a single management interface. The Reseller Hosting lacks a specific technical specification related to the host server, excluding the ability for managing a group of Shared accounts, setting own DNS and a few more features.

Reseller Account holder usually act as sellers of Shared Hosting Accounts. The most popular REseller Hosting management interface is cPanel’s WHM.