In the Domain Name System (DNS) hierarchy, a subdomain is a domain that is part of a larger domain. For example, "example.com" is a subdomain of the "com" top-level domainroot domain, ".". (TLD) and "www.example.com" is a subdomain of "example.com". In fact, the "com" TLD is a subdomain of the

Relative to a subdomain, the larger domain that it is a part of is its parent domain, or alternately superdomain (the former term appears to be preferred by the IETF).

A subdomain is sometimes termed a vanity domain, especially when it is a subdomain of an ISP's own domain aliased to an individual user account. However, the term "vanity domain" has other usages, discussed at that article.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Metasyntactic variable".

Source from:http://en.wikipedia.org

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