What is telnet
telnet is a commandline tool prividing bidirectional interactive text-oriented communication facility using a virtual terminal connection.
telnet is both a protocol, and a commandline tool.
Because on its insecure nature, the only acceptable usecase for using
telnet is a direct cable connection to a router or a switch.
telnet allows to perform administration tasks on a router or a switch.
Starting from Windows 10,
telnet is disabled on Windows systems. In order to enable it:
Dism /Online /Enable-feature /FeatureName:TelnetClient
telnet <domain name or IP address> <port number>