The OSI model - and AppleTalk. If I look at some of the...

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The OSI model, or the Open Systems Interconnection Reference Model is the worlds most prominent networking architecture model. The OSI model is a layered model of a communications break down. It separates different functions on different layers for communication and data processing. One of the reasons for this was to help the explanation and design of the protocol. This means that a vendor can write device drivers for a device, without having to worry about the layers that are above the layer he is working with. The physical layer carries protocols such as EIA/TIA-232, V.24, v.35 and ISDN. The data link layer handles the NCP, LCP, and HDLC. The Network Layer handles IP, IPX,
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Unformatted text preview: and AppleTalk. If I look at some of the models and what I have been reading I would say that WAN protocols span over the lower 3 layers. It seems to me that it may spend more WAN protocol time on the network layer in relation to internetworking, routing functions, and end to end addressing. But I can also see it at work on the data link layer by providing link management, and error connection. On the physical layer we get access to media, define voltage rates, and define physical connections. References: Weekly chapters in textbooks, Introduction to Networks Voice and Data Voice Communication Introduction to OSI Model...
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This note was uploaded on 11/07/2011 for the course IT 240 242 taught by Professor Some during the Spring '10 term at University of Phoenix.

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