Network+

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Interoperability


The only computer that comes with AppleTalk installed by default is the Macintosh. Most Windows operating systems are able to use the AppleTalk protocol, but require that additional software be installed.

Naming


AppleTalk uses the Name Binding Protocol (NBP) to associate the name of the computer with its network address. It is broadcast based. Every station broadcasts its name when it comes up on a network. The AppleTalk router on a network will cache these names and respond to the NBP request. When a node requests a name resolution, the local router will answer with information it has obtained from this cache.


If an AppleTalk network doesn’t have a router, each node will perform both NBP requests and NBP responses.

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.

Exam Essentials


Be able to specify the main features—including speed, access method, topology, and media—of various network technologies, such as 802 standards and FDDI. You should be able to differentiate between the various technologies when studying for the exam. Refer to Table 2.2 for help.

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