When you type help ping at a command prompt, Windows NT displays:
This command is not supported by the help utility. Try "ping /?".
When you type ping /?, Windows NT displays:
Bad IP address /?.
To get help, just type ping or ping -? at a command prompt.
To get additional help on the Packet Inter Net Groper:
Click Start / Help / Index Tab and type ping and double-click the Ping Utility topic.
You may wish to read the following KB articles: