Telnet used to communicate with another host on a network
| Command | Options | Details |
| # telnet | User interface to telnet protocol, used to communicate with another host | |
| -4 | Force IPv4 address resolution | |
| -6 | Force IPv6 address resolution | |
| -K | Specifies no automatic login to the remote system. | |
| -l user | Specify user as the user to log in as on the remote system | |
| host | Indicates the official name, an alias, or the IP address of a remote host. | |
| port | Indicates a port number (address of an application). If a number is not specified, the default telnet port is used. |