This is now expanded to association to the wireless networks.
The random mac address was limited to probe for known wireless networks. When wireless endpoint is associated with random mac address, the MAC address of the endpoint changes over time. To improve end-user privacy, various operating system vendors (Apple iOS 14, Android 10 and Windows 10) are enabling the use of the locally administered mac address (LAA), also referred to as the random mac address for WIFI operation. In this document, this will be referred to as normal mac (address), in contrast to the random mac (address). Use of this burn-in address everywhere raises the question of end-user privacy as the end-user can be tracked with WIFI’s mac address. This manufacturer-assigned mac address, which is globally unique, is also known as burn-in address (BIA). Historically wireless clients associate to the wireless network using the manufacturer assigned mac address that is associated with the wireless network interface card (NIC).
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