Domains

Domains or domain name are an easy-to-remember name that is translated by Domain Name Servers into a server's IP address. eg: wwww.mydomain.com into 91.186.75.31

Domain names are hierarchical, a dot (.) represents the root and is used as a boundary between domains. eg:

. : The root namespace
com. : The "com" top-level domain
example.com. : The "example" domain name
www.example.com. : The "www" host name

In the above example, "example.com" is a domain name that represents a specific domain of computers under the "com" top-level domain, and "www.example.com" is likely the web server in the "example.com" domain. The top-level domains such as ".com", ".net", and ".org" are controlled by the domain name registry, but users can register a domain name under the top-level domains in order to name the computers that they control.

The domain name registrant does not "own" the domain name but is the registered controller of it for the period of time that the domain name is registered. A domain name can be registered through a domain name registrar.