Determining physical address ( AKA MAC address or Ethernet address)
Sometimes, you'll need to know the physical address of your computer, sometimes known as MAC address or Ethernet address.
How to determine the physical/MAC/ethernet address of your computer
To do this in Windows, open your Start/Windows menu, and type "cmd" (without quotes) to search for command line, then hit Enter to open a command line window.
In command line, type "ipconfig /all" (no quotes) and hit Enter. This will print out three groupings of information. Within the "Ethernet adapter Ethernet" grouping, the Physical Address is listed in the third row.