Which statement correctly describes a fully qualified domain name (FQDN)?

Which statement correctly describes a fully qualified domain name (FQDN)?

• A. It combines a domain name with a host name
• B. It is the same as a domain name
• C. It is the hostname only without domain
• D. It is the IP address of a server

Answer: (A)

A fully qualified domain name is the exact, complete address that uniquely identifies a specific host within the DNS hierarchy by combining the host name with the domain name. The host name specifies the particular machine (like a server or computer), and the domain name indicates the network segment it belongs to (like example.com). When you join them, as in host.example.com, you have a precise identifier that tells DNS exactly where to reach that machine, including the top-level domain and, in proper DNS notation, the trailing root. This is different from a domain name alone, which designates a domain or zone but not a specific host, and different from a hostname alone, which lacks the domain portion. It’s also not the IP address, which is a numeric route target rather than a name. So the description that the FQDN combines a domain name with a host name best captures its meaning.

A fully qualified domain name is the exact, complete address that uniquely identifies a specific host within the DNS hierarchy by combining the host name with the domain name. The host name specifies the particular machine (like a server or computer), and the domain name indicates the network segment it belongs to (like example.com). When you join them, as in host.example.com, you have a precise identifier that tells DNS exactly where to reach that machine, including the top-level domain and, in proper DNS notation, the trailing root. This is different from a domain name alone, which designates a domain or zone but not a specific host, and different from a hostname alone, which lacks the domain portion. It’s also not the IP address, which is a numeric route target rather than a name. So the description that the FQDN combines a domain name with a host name best captures its meaning.