It’s very rare that I use Telnet these days, so it took a long time for me to notice that by default it was not packaged with Windows 7. I did some research and found out that this was also true for Windows Vista. More than likely this was an attempt to make Windows more secure by default, as Telnet is very insecure and whenever you have the choice you should always use SSH. However, with that being said, you can quickly re-enable Telnet by following these steps:

Start Control Panel Programs And Features Turn Windows features on or off Check Telnet Client Hit OK

After that you can start Telnet via Command Prompt.