Physical to IP address translation

Goto: Start, Programs, DOS Prompt, then type:
PING www.AddressYouWant.com
Should return the IP address after the Ping

Cheers
George

If the Physical (MAC) address is physically on your network segment, it might be possible.

Every computer maintains what is known as an ARP (Address Resolution Protocol) database. ARP provides IP-to-Physical addreess translation. Any time a computer exchanges packets with another, it updates its ARP database with that computer's IP and Physical addresses.

Perform the following steps (preferably on your domain controller as usually all connected computers talk to it) to see if the MAC address in question is in your network and if so, what its IP address is:

1. Open up a DOS window (command prompt).
2. Type . This will return a listing of all computers in the ARP database of this computer, showing IP and MAC addresses.

You can also determine the MAC address of a particular IP address by typing . This command will return the MAC address for the input IP address. Ther is no similar command to determina an IP address for a particular MAC address.