Sub Domain

Definition:

A subdomain represents part of the main domain name. If the main domain name is:

mydomain.com

Then subdomains will have a form of part.mydomain.com .For example:

  • blog.mydomain.com
  • shop.mydomain.com

Subdomains are commonly used to connect to other web applications on your host computer. For example:

  • Main site “mydomain.com” connects to the landing page of your main website application.
  • On your main website’s header, a “blog” button links to “blog.mydomain.com” that connects to your blog post web application.
  • A “shop” button links to “shop.mydomain.com” that connects to your online store web application.

Analogy:

  • Phone number extension: adding extensions to the main phone number enables caller to connect to company’s sub-divisions for different services (sales department for placing orders; service department for complaint; marketing department for product inquiries).

Common Examples:

  • blog.  : blog service
  • shop. : transaction service
  • wiki. , documentation. : documentation service
  • m. : mobile version