MAC Address

Short for Media Access Control address, a hardware address that uniquely identifies each computer or
device on a network.

The assumption that by allowing only systems with authorized MAC addresses onto the network
protects that network is wrong and very costly assumption. The reality is that this particular security
measure is easy to circumvent, and thus good only as a deterrent for less sophisticated users.
Anyone who really wants to gain access to your network (with a good general understanding of WiFi
networks and the right utilities) could easily gain access. Your MAC address can be spoofed by readily
available tools and utilities or even through a simple registry entry in Windows. Tools like Kismet or
NetStumbler can intercept your MAC address and then spoof it, making an unauthorized system look
legitimate.

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