Editing Subdomain (section)

== Subdomain usage ==
{{refimprove section|date=March 2023}}

Subdomains are often used by internet service providers supplying web services. They allocate one (or more) subdomains to their clients who do not have their own domain name. This allows independent administration by the clients over their subdomain.

Subdomains are also used by organizations that wish to assign a unique name to a particular department, function, or service related to the organization.  For example, a university might assign "cs" to the computer science department, such that a number of hosts could be used inside that subdomain, such as <code>www.cs.example.edu</code>.<ref>{{Cite web |title=What Is A Subdomain? Everything You Need To Know – Forbes Advisor |author1=Shweta |author-first2=Kelly |author-last2=Main |others=Reviewed by Rob Watts |url=https://www.forbes.com/advisor/business/what-is-a-subdomain/#when_to_use_a_subdomain_section |access-date=2023-03-31 |website=www.forbes.com |archive-date=2023-03-31 |archive-url=https://web.archive.org/web/20230331140947/https://www.forbes.com/advisor/business/what-is-a-subdomain/#when_to_use_a_subdomain_section |url-status=live }}</ref>

There are some widely recognized subdomains such as WWW and [[FTP]]. This allows for a structure where the domain contains administrative directories and files including the FTP directories and webpages. The FTP subdomain could contain logs and the web page directories, while the WWW subdomain contains the  directories for the webpages. Independent authentication for each domain provides access control over the various levels of the domain.