# data[].attributes.headline
A media access control address (MAC address) of a computer is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment.

# data[].attributes.subject
A media access control address (MAC address) of a computer is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment.

# data[].attributes.headline
Link layer- handles all the physicaldetailes of interfacing with the cable, including the network interface card and a device driver

# data[].attributes.subject
Link layer- handles all the physicaldetailes of interfacing with the cable, including the network interface card and a device driver