For security reasons Windows 8 comes without telnet client, so you can’t connect to other hosts with telnet.
Steps to enable Telnet on Windows 8:
1. Open the Control Panel.
2. Click on Uninstall or Change a Program.
3. Click on Turn Windows Features On or Off.
4. Check Telnet Client and Telnet Server and click OK.
5. Telnet will be installed.
6. You can then access telnet from the command prompt by typing “telnet” without quotes.