Did you know Cybrary has FREE video training? Join more than 2,500,000 IT and cyber security professionals, students, career changers, and more, growing their careers on Cybrary.
Mac Addresses We mentioned MAC Addressing in the previous lesson. For this lesson, we expand on MAC Addressing significantly and discuss how the protocol data unit is structured in layer 2, the data link layer and the function of each component. For example, you'll learn what a frame and dissect a diagram of the pertinent frame components you'll need to know for the CCNA exam.