Summary

In this chapter, you learned about the OSI model and had an introduction-to a few of the most popular protocols in use today. You also learned about the seven layers that make up the OSI model, including (from top to bottom) the Application, Presentation, Session, Transport, Network, Data Link, and Physical layers. You also learned what each layer’s primary responsibility is. In the later sections, you learned about which devices operate at each layer of the OSI model.

In this chapter, you also learned about some of the major protocols, including TCP/IP, IPX/SPX, NetBEUI/NetBIOS, and AppleTalk, and how the different parts work together. For each protocol, you learned which parts of the protocol stack handle the concepts of addressing, routing, interoperability, and naming.