What does FQDN stand for?

FQDN stands for Fully Qualified Domain Name. This term is crucial in the context of networking and the internet, as it uniquely identifies a specific host within the domain name system (DNS) hierarchy. An FQDN includes both the hostname and the domain name, providing a complete address that allows users and systems to access resources reliably. For example, in the FQDN 'www.example.com', 'www' is the hostname, and 'example.com' is the domain name. This uniqueness ensures that the correct resource is located and accessed without ambiguity, which is vital for online communication and interaction.

The other options, while they might incorporate similar terms, do not convey the correct meaning associated with FQDN in networking and internet concepts. Understanding FQDN is essential for network configuration, troubleshooting, and various IT-related tasks.