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MAC address or physical address is the original hard coded address on your NIC. In my earlier post  i have mentioned 2 methods to change MAC address manually Changing MAC manually might take lot of time and complicated when you have more than 2 cards(including wireless LAN cards).

Technitium MAC Address Changer is a simple and free utility like Macshift, provides ample information of the Network Cards allowing you to change address on multiple cards without rebooting PC, a must tool for Network professionals.

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Media Access Control(MAC) is a machine address that uniquely identifies each machine on the network. It uniquely defines the Network adapter/Ethernet card or what most people call the LAN card on a Local Area Network. MAC addresses are 12-digit hexadecimal numbers(48 bits in length), something like this 00:1C:EA:C2:63:25

It is quite unlikely that you will ever need to change your MAC/Physical address of your  computer, but it’s always better to know.

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