In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Q: A media access control address (MAC address) of a device is a unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. In this context, MAC addresses are used in the medium access control protocol sublayer.
A: 
what is the full form of mac address