• Unit 6: The Link Layer

    The final layer of the TCP/IP protocol stack that we discuss is the link layer. This unit will explain how you can address machines on a network from that layer, use IP addresses to determine physical addresses, and identify the mechanisms in the link layer that can correct packet collisions when data is transferred over the wire. This unit discusses the link layer by focusing on how multiple hosts share one transmission medium. The unit ends with a detailed discussion of the two types of computer networks that are important today from a deployment perspective: Ethernet and Wi-Fi.

    Completing this unit should take you approximately 7 hours.

    • 6.1: Principles of the Link Layer

    • 6.2: Medium Access Control

    • 6.3: Link Layer Technologies

    • 6.4: Summary

    • 6.5: Practice Exercises

    • Unit 6 Assessment

      • Receive a grade