Every NIC (Network Interface Card) has a unique MAC address (Media Access Control). This applies to all types of network cards, including Ethernet cards and WiFi cards. The MAC Address is a six-byte number or 12-digit hexadecimal number that is used to uniquely identify a host on a network.
An example of a MAC address is 1F-2E-3D-4C-5B-6A and it falls into the Layer 2 networking protocol of the OSI model. In today’s networks, ARP, or Address Resolution Protocol converts a MAC address to a Layer 3 protocol address, such as an IP address. A MAC address can also be called a Physical Address. Read my post on how to find your MAC address if you don’t know it.
All MAC addresses are hard-coded into a network card and can never be changed. However, you can change or spoof the MAC address in the operating system itself using a few simple tricks.
So why would you want to change your MAC address? Well there are many reasons for this, mostly related to bypassing some kind of MAC address…