Subdomains

If we type in our browser's address bar "www.cnn.com", visit CNN's website, we are using is known as a subdomain.

Some people call it a "" prescribed, and we term "third level domain is seen" (argument that ". Com" is a top-level domains are like, 'CNN' second level, and "third because www "is).

Some countries including the United Kingdom, the top level in two parts "include" domain, such as: ". Org.uk" or ". Co.uk.

Domain name "mycompany.co.uk" So a 'real' domain name, not "co.uk" a subdomain! Here ( "sales.mycompany.co.uk" will be a subdomain.)