Fully Qualified Domain Name Definition. The term fully qualified file name means a file on a computer whose exact name is completely specified such that it is unambiguous and cannot be mistaken for any other file on that computer system. A domain is a node in context and a fully qualified domain name has a presentation form that is just the node names bottom up with each followed by a period.
A fully qualified domain name sometimes also referred to as an absolute domain name is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System. A fully qualified domain name FQDN is a domain name that specifies not only its top-level domain and parent domain name but also its local host. Certificate-based security for secure signaling and media.
It specifies all domain levels including the top-level domain and the root zone.
It can only be interpreted one way. In the Domain Name System DNS FQDN is a dotted name that fully identifies a TCPIP host on the Internet. Single Sign-On SSO Jabber deployments requiring user registration auto-discovery. It specifies all domain levels including the top-level domain and the root zone.