A Fully Qualified Domain Name (FQDN) is the complete address of a website and consists of the website’s host name, subdomain name, and top-level domain name. FQDNs are typically used for domain names that are registered with a domain name registrar. Understanding the fundamentals of FQDNs is critical for setting up a website and web-based email, as these domain names need to be linked with the internet’s DNS system. Knowing the components of an FQDN can help address potential DNS issues and ensure efficient communication between servers and clients. Learn more about the benefits that FQDN has.