1. Computing

FQDN

By

Definition: A fully qualified domain name, most often seen shortened to FQDN, is written with the host name and the domain name, including the top-level domain.

The following are examples of FQDNs:

www.microsoft.com
pcsupport.about.com
p301srv03.timandtombreadco.us

Domain names that are not "fully qualified" will always have some sort of ambiguity about them.

For example, p301srv03 can't be a FQDN because there are any number of domains that might also have a server by that name. Even microsoft.com isn't fully qualified because because we don't know for sure what the host name is, even if most browsers do automatically assume it's www.

Also Known As: absolute domain name
Examples:
"In my office, I frequently access our file server simply as srv01, but when connecting to it over the Internet, I know I have to use the FQDN instead: srv01.smithandthompsonlaw.com."
  1. About.com
  2. Computing
  3. PC Support
  4. Glossary / Terms
  5. F
  6. FQDN Definition (Fully Qualified Domain Name)

©2014 About.com. All rights reserved.