COMPUTER FUNDAMENTALS

Detailed explanation-1: -The telnet protocol is a client-server protocol, based on a reliable connection-oriented transport. This protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23 or 2323, where a Telnet server application is listening.

Detailed explanation-2: -Port 23 is typically used by the Telnet protocol. Telnet commonly provides remote access to a variety of communications systems. Telnet is also often used for remote maintenance of many networking communications devices including routers and switches.

Detailed explanation-3: -The telnet protocol runs on TCP port 23. What is the difference between telnet the protocol and telnet the application? Telnet the protocol is a terminal session protocol for connecting to remote systems.

Detailed explanation-4: -It is the default port. If you install a telnet server with a default configuration it will listen to port 23. Accordingly if you use a telnet client without specifying a port, it will try to connect to the port 23 of the destination. It also means that no other service should use this port.

Detailed explanation-5: -By default, a telnet server listens on port 23 for incoming connections from clients.