Telnet is a simple program which is text based and can be used by using the internet to connect to another computer. You can access a remote computer by entering commands using Telnet. There are different Telnet commands which can be used. Some of the Telnet commands are listed below.

Open or o: - This command is used when you want to establish a remote server or the host computer. The full command which is “open” can be used or only the abbreviation “o” can also be used to give this command. For example if you want to connect to a certain computer, then when you give the command o max 44 then it will connect you to that computer.

Close or c: - Like with the open command you can set up a connection with a host computer or remote server, similarly with the close command you can close the connection. You can use the full command which is “close” or you can also use “c”. For example, to close the connection you can type c max 44 to close the connection with that computer.

display: - You can get the current operating parameters by typing display. You can also modify the parameters while in a Telnet session. The operating parameters which are available are WILL AUTH, WONT AUTH, WILL TERM TYPE, WONT TERM TYPE, LOCALECHO off, and LOCALECHO on.

quit or q: - You can use this command while exiting from Telnet.

set: - when you want to set the type of the terminal you can use this command. You can also set the authentication type. When you want to turn NTLM then type SET NTLM. When you connect from a remote computer using the NTLM authentication then you do not have to type the logon name and password. If you want to use the normal command line applications then you should use VT100 terminal. While using advanced command line applications the terminal type VTNT can be used. These advanced applications are ESCAPE + Character, LOGFILE Filename, LOGGING.

Unset: - Unset command is used to turn off the local echo that means it is used to set the authentication for logon username and password prompt. When you want to turn of NLM then type UNSET NLM. To turn off local echoing type UNSET LOCALECHO.

Status: - when you have to check or determine that whether the Telnet client is connected or it is not then the status command can be used.

CTRL+]:- you can use the command CTRL+] to move the command prompt to another session from a connected one.

Enter: - If there is any existing connection then you can go to that connected session any time by using the enter command.

?/help: - this command is used to view the help information.