A Fully Qualified Domain Name (FQDN) consists of a hostname and domain name. To determine the FQDN of 'Tom', one would need to know the domain 'Tom' belongs to, which isn't provided in the question. An example FQDN could be 'tom.houston.supportserver1dns1', given a domain structure.
A FQDN, or Fully Qualified Domain Name, is the complete domain name for a specific computer, or host, on the Internet. It consists of two parts: the hostname and the domain name. To specify the FQDN of 'Tom', you would need to know the domain that 'Tom' is a part of. For example, if 'Tom' is a computer on the 'houston' network, and 'houston' is a part of the 'support server 1 DNS 1' domain, then you could write the FQDN as 'tom.houston.supportserver1dns1'. However, since the question does not provide the complete domain hierarchy, it is impossible to give an exact FQDN for 'Tom'.
Please note that an FQDN always has at least a hostname and a domain name, and it typically follows the format: hostname.domain. The hostname 'Tom' by itself is not a FQDN until it is combined with the domain information.