can someone explain how to use telnet as well as onputting the commands such as if-modified-since?

3. Telnet into a Web server and send a multiline request message. Include in the request message the if-modified-since: header line to thrce a response message with the 304 Not Modified status code. Show a screenshot of your commands and response. (hint: Telnet may not be available in you current Windows by default. to make it available, go to Control Panel, Programs and Features, Turn Windows Features On or Off, Check Telnet client.) (7pts)