What is the complete domain name of an Internet computer called?

The complete domain name of an Internet computer is referred to as the Fully Qualified Domain Name (FQDN). An FQDN provides the complete path to a specific resource on the Internet, incorporating both the hostname and the domain name. For example, in the FQDN "mail.example.com", "mail" is the host name and "example.com" is the domain name.

This precision in the naming structure ensures that each domain name is unique and can be resolved to a specific location on the Internet. The FQDN is critical for DNS (Domain Name System) resolution, as it contains all the necessary information to locate a specific computer or service, thereby facilitating communication over the Internet.

In contrast, while other terms like IP Address, Host Name, and URL are related, they do not encompass the complete specification of a domain name. An IP Address identifies the numerical label assigned to each device participating in a network, a Host Name typically refers to the specific name given to a machine within a network, and a URL is a complete reference to a resource that may include the protocol along with the domain name but does not inherently define the complete domain structure.