MCCP must be implemented on the server side as well as the client side, and negotiated using the Telnet protocol.

It is also possible to play a machine from another computer-for example, over the Internet-using the Telnet protocol and a webcam.

Among other features Telnet protocol was assigned server port 23.

A character terminal "Traveling User" gateway using the Telnet protocol was also available.

The application allows the end user to access IBM 3270, IBM 5250 and other Virtual terminals using the Telnet protocol whether through a secure or unsecured mode of communication.

For example, a host name and a request for "Terminal Connection" might yield a connection over TCP/IP using the Telnet protocol (although there were many other possibilities).

To telnet means to establish a connection with the Telnet protocol, either with command line client or with a programmatic interface.

As of mid-2010, the Telnet protocol itself has been mostly superseded for remote login.

Most device servers are accessed with TCP connections (raw or using the Telnet protocol) to gain reliable delivery of the application's data stream in order of transmission.

This simplicity of the protocol also permits an application, and a command line interface user, to query a WHOIS server using the Telnet protocol.