Remote users wishing to obtain information about the user of a specific computer could do so by querying their machine's finger server listening on port 79. This information typically included the user's full name, address, telephone number, title, job name, office location, telephone extension, and so on.

Port 79 is used for the Finger protocol, which provides information about users on a network. One cybersecurity concern related to Port 79 is that it can be exploited by attackers to gather information about users, potentially aiding in reconnaissance for further attacks.

Port 80 is the default network port for web servers using HTTP. It operates on the application layer of the TCP/IP networking model and serves as the communication gateway for HTTP requests and responses between client computers and servers.

TFTP is a simple protocol for transferring files, implemented on top of the UDP/IP protocols using well-known port number 69. TFTP was designed to be small and easy to implement, and therefore it lacks most of the advanced features offered by more robust file transfer protocols.