A. Windows 2000 introduces media-sense which in a Network Interface Card can detect if it is connected to a network cable and if it is not connected it disables protocols on that adapter (although the loopback address 127.0.0.1 and the local hostname still works).

This may be very inconvenient especially on portables as you may have programs running which requires use of its normal IP address so you can disable this media-sense for TCP/IP only (not the other protocols)

  1. Start the registry editor (regedit.exe)
  2. Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  3. From the Edit menu select New - DWORD value
  4. Enter a name of DisableDHCPMediaSense and press Enter
  5. Double click the new value and set to 1
  6. Click OK
  7. Reboot the computer

Cheers to Thomas Lee for letting me know media-sense existed :-)