Introduction
Where the TCP protocol makes it possible to connect the remote computers, the TELNET
protocol makes it possible to use them. The TELNET protocol offers a user the possibility to
connect and log on to any other hosts in the network from user’s own computer by offering a
remote log on capability. Historically TELNET was the first TCP/IP application and still is
widely used as a terminal emulator. Today, while the applications are more and more
equipped with the graphical user interface, the terminal-based applications are becoming
minority among the applications, the TELNET has found its future as a toolkit lying below
several client/server software. E.g. FTP, SMTP, SNMP, NNTP and HTTP are more or less
dependent on the TELNET protocol.