What is FQDN?

FQDN is an abbreviation for Fully Qualified Domain Name.

It refers to a complete domain name that includes both a host and a domain name.

The domain name is made up of two parts: a second-level domain and a top-level domain.

In the case of www.mydomain.com, the host is 'www,' the second-level domain is 'mydomain,' and the top-level domain is '.com.'