Background

• Telnet is a terminal emulation protocol that allows you to make command line connections to compatible devices. It is frequently used to make configuration changes to remote systems.
  
  

Uses

• You can use the telnet protocol to connect to network devices, make changes and check settings. It is often used alongside physical serial connections to configure routers and other network equipment.
  
  Another common use of telnet is to check remote SMTP (Simple Mail Transfer Protocol) email servers, which can be manipulated using telnet commands.
  
  

Commands

• There are various text commands that can be issued within telnet sessions. The available commands depend on the device or server you are connected to. Consult the relevant documentation for a list of available commands.