Hostname Vs Domain Name Vs Fqdn. Fully Qualified Domain Name FQDN and Partially Qualified Domain Name PQDN Fully Qualified Domain Name FQDN of a host in the DNS namespace hierarchy consists of all the labels from the node up to the root of the namespace separated by periods. A hostname is the name of a computer while a domain name is the name of a group of computers.
In looking at a fully qualified domain name the host name typically comes before the domain name. Fully Qualified Domain Name FQDN and Partially Qualified Domain Name PQDN Fully Qualified Domain Name FQDN of a host in the DNS namespace hierarchy consists of all the labels from the node up to the root of the namespace separated by periods. Understand the differences - Copahost.
The length of any one label is limited to between 1 and 63 octets.
Example Hostname value bob-berto-pc. If you just use hostnames names like mail or www will not be unique FQDN is unique. A hostname is the name of a computercloud server that is connected to a network. These elements are separated by a period.