Domain Name System

up:: The Internet MOC Short: DNS.

The Domain Name system lets the user enter a website over a domain name (like rather than over numeric IP addresses which are hard to remember.

Top-level domains

There are two types of domain names:

  • Generic top-level domains (gTLDs) like .com, .org, .gov
  • country-code top-level domains, like .de for Germany, .us for the United States and so on.

In 2011 ICANN (who administer DNS) voted to make it easier to create new gTLDs. As a result, there may be plenty more!


The DNS system is hierarchical.

For example, the company Verisign assigns .com domains like or Owners of these domains can in turn create subdomains like