The Internet implements the TCP/IP protocol to allow computers
to converse with each other over networks. Telnet is an
example of a program that makes use of this protocol. This
program allows a person to log into and use a distant computer
supporting TCP/IP protocols almost as if sitting physically
at that computer.
For the average web user telnet is not so important as
it was a few years ago, since many of the features it once
made available are now otherwise accessible via browsers.
People who have accounts on multiuser computers (particularly
those using unix/linux operating systems), however, still
find telnet to be an indispensible tool for accessing their
work, from home, from the road, or from around the world.