# Using the Telnet Client Capabilities

The Telnet protocol is one of the TCP/IP protocols for data transmission on the Internet that allows a client application to connect to and run commands on a remote machine.

The Internet Library does not provide functions that let you create a Telnet server.

When you attempt to open a Telnet connection, you must provide the name or IP address of a remote machine running a Telnet server on the specified port.

| Note The standard Telnet port is 23.

The LabWindows/CVI Internet Library provides functions that allow you to open and close connections to a Telnet server. An application can send commands to the Telnet server, read data from the Telnet connection, and run scripts consisting of paired prompts and replies.