View source for Fully qualified domain name

A '''fully qualified domain name''' ('''FQDN'''), sometimes also referred to as an '''absolute domain name''', is a [[domain name]] that specifies its exact location in the [[tree hierarchy]] of the [[Domain Name System]] (DNS). 

== Description ==

It specifies all [[domain levels]], including the [[top-level domain]] and the [[root zone]].

== Unambiguous ==

A fully qualified domain name is unambiguous: it can be interpreted only in one way.

== DNS root domain ==

The [[DNS root domain]] is unnamed, which is expressed by the empty label, resulting in a fully qualified domain name ending with the dot character.

== Origin ==

The need for fully qualified domain names first arose out of a requirement for uniformity as the Internet was quickly growing in size in the 1980s.

== See also ==

* [[Domain level]]
* [[Domain name]]
* [[Domain Name System]]
* [[Top-level domain]] 
* [[Root zone]]

== External Links ==

* [https://en.wikipedia.org/wiki/Fully_qualified_domain_name Fully qualified domain name] @ Wikipedia