TELNET (TELecommunication NETwork) is a network protocol developed in 1969, used on the Internet or local area network (LAN).
The telnet provides access to a command-line, interface on a remote host by means of a virtual terminal. The network terminal protocol (TELNET) allows a user to log in on any other computer on the network. We can start a remote session by specifying a computer to connect to. From that time until we finish the session, anything we type is sent to the other computer.

The Telnet program runs on the computer and connects your PC to a server on the network. , We can then enter commands through the Telnet program and they will be executed as if we were entering them directly on the server-side.

This enables to control the server and communicate with other servers on the network. To start a Telnet session, we must log in to a server by entering a valid username and password. Telnet is a common way to remotely control Web servers.