A unique hardware identification code is assigned to the network interface controller of a device operating on the Android platform. This identifier, a Media Access Control address, is crucial for communication within a local network. For example, a router uses this address to direct network traffic to a specific smartphone or tablet.
This identification code enables features like network security through filtering techniques, such as permitting access only to pre-approved devices. It also facilitates device tracking in certain network management scenarios. Historically, this address provided a relatively static identifier, but evolving privacy considerations have led to mechanisms that allow for its randomization.
