TCP Transmission Control Protocol

TCP is a higher level protocol running over IP, the two are often combined into the term TCP/IP. Originally this would run on Unix machines although other machines can use it, for example our PCs can connect to UNIX workstations using it. TCP/IP provides the base for a full range of network services such as:-

ftp

An interactive program to transfer files between sites. Is is being phased out as it is insecure.

telnet

Software to provide remote login. It is being replaced by SSH.

smtp

Simple Mail Transfer Protocol.

ssh

Provides secure encrypted communications between two untrusted hosts over an insecure network. It allows remote login and is the basis for file transfers and other communication channels e.g. X windows.

Full screen access

Remote login based on X windows.