Apple Macintosh System 7.5 - Manual (Page 105)

My computer does not respond to a “ping.”
Make sure you have an active application on your computer that uses TCP/IP
and can respond to a “ping” from another computer.
Make sure your TCP/IP configuration is correct.
Make sure your network cables are properly connected.
Make sure your network is functioning properly.
I can’t remember my Administration password.
You can erase your Administration password (along with all of your TCP/IP
settings) by dragging the TCP/IP Preferences file (inside the Preferences
folder in your active System Folder) to the Trash. When you open the TCP/IP
control panel again, you must reenter all your settings.
97 Troubleshooting