MAC Address
Definition
A link-layer identifier used by network interfaces.
Detailed explanation
A MAC Address is a link-layer identifier used by interfaces on technologies such as Ethernet and Wi-Fi. It is usually represented as 48 bits, although software can use randomized or locally administered values. A MAC address identifies an interface on a local network segment rather than a person or global location. Ethernet switches learn source addresses to forward frames within a broadcast domain, and Wi-Fi uses addresses in management as well as data frames. Modern operating systems randomize probe and per-network addresses to reduce tracking, so the factory value may not be the one visible to an access point.
Where you are likely to see it
This term is most often visible in adapter properties, wireless settings, connection diagnostics, or a network-driver release note. The definition above gives the short meaning; the detailed explanation describes the term's role in the operating system and hardware stack.
Adapter models, radio standards, and operating-system versions provide the context for interpreting the label. This glossary is informational and does not provide repair, installation, or technical-support services.
Related vocabulary
Explore connected concepts and nearby entries in the Windows hardware vocabulary.