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:

Q102908 - How to Troubleshoot TCP/IP Connectivity with Windows NT.

Q169790 - How to Troubleshoot Basic TCP/IP Problems in Windows NT 4.0.