# Media Access Control Address A Media Access Control (MAC) address identifies a network interface within a link-layer context. One computer can have several MAC addresses because Ethernet, Wi-Fi, and Bluetooth interfaces are distinct; modern systems may also randomize addresses in some contexts. ## Notebook evidence - [[Scanned_20260730-1230#PDF Page 1|PDF page 1]] — Four interface identifiers per Mac Pro. - [[Scanned_20260730-1230#PDF Page 25|PDF page 25]] — Uncertain Compute Stick MAC. - [[Scanned_20260730-1230#PDF Page 37|PDF page 37]] — Nighthawk M1 MAC. A MAC supports correlation within an appropriate scope; it is not proof of person, location, authorization, or compromise.