fully qualified domain name definition networking
(FQDN) The full name of a system, consisting of its local hostname
and its domain
name, including a top-level domain
(tld). For example, "venera" is a hostname and "venera.isi.edu" is an FQDN. An FQDN should be sufficient to determine a unique Internet address
for any host on the Internet
. This process, called "name resolution", uses the Domain Name System
With the explosion of interest in the Internet
following the advent of the World-Wide Web
, domain names (especially the most significant two components, e.g. "sun.com", and especially in the ".com" tld) have become a valuable part of many companies' "brand". The allocation of these, overseen by ICANN
, has therefore become highly political and is performed by a number of different registrars. There are different registries for the different tlds.
A final dot on the end of a FQDN can be used to tell the DNS that the name is fully qualified and so needs no extra suffixes added, but it is not required.
See also network, the
, network address