MAC Spoofing

From Hakipedia

In computer networking, a Media Access Control address (MAC address), Ethernet Hardware Address (EHA), hardware address, adapter address, or physical address is a quasi-unique identifier assigned to most network adapters, or network interface cards (NICs) by the manufacturer for identification. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number. Three numbering spaces, managed by the Institute of Electrical and Electronics Engineers (IEEE), are in common use for formulating a MAC address: MAC-48, EUI-48, and EUI-64. The IEEE claims trademarks on the names "EUI-48" and "EUI-64", where "EUI" stands for Extended Unique Identifier.

Although intended to be a permanent and globally unique identification, it is possible to temporarily change the MAC address on most of today's hardware, an action often referred to as MAC spoofing.