The mac address is the PHYSICAL address of your network card. Each network card is manufactured with a unique address which distinguishes it from every other network card in the world. If you're using Windows XP, open a command prompt and type:
ipconfig /all
About half way down you'll see
"physical address . . . . . . . . xx-xx-xx-xx-xx-xx"
That's your mac address. If you were to look at your network card, that's also the physical address that would be on the label.
•What is the physical address (the MAC address) of the NIC (or network adapter) for this connection?
MAC address stored in NIC card
OUI
NIC
MAC bit size is 16 digits. but MAC bit is 48 each.
OUI
Doesn't matter if your connected to a LAN or not. The MAC address is hard coded into the NIC and does not change unless software on the computer requires that it changes.
Mac address
Source MAC address
getmacGetmac
ipconfig
Destination MAC address