i use telnet to access my ADSL Modem or other devices like that but this command was not packaged with Windows 7. I think 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...

Arp The arp command is used to display or change entries in the ARP cache. Assoc The assoc command is used to display or change the file type associated with a particular file extension. At The at command is used to schedule commands and other programs to run at a specific date and time. Attrib The attrib command is used to change the attributes...