Checkpoint-Osi Model

OSI Model Yvette Flores IT 242 April 8, 2011 Lawrence Master OSI Model An Open Systems Interconnection (OSI) wing influence is the worlds major webing architecture hazard (Regan, 2004). According to Regan, The OSI reference model adopts a layered glide path where a communication subsystem is mortified down into seven layers, apiece one of which performs a thoroughly defined function (2004). So it serves as a model in which then veritable services and protocol arsehole be drafted. The layers are as followed: application, presentation, session, transport, network, entropy tie, and physical. The layers that WAN (Wide cranial orbit Networks) protocols operate in the OSI Model would be network, selective information link and physical. Being that network is defined in the OSI model as being obligated for addressing and routing between sub-networks (Local Area Networks being that), in like way of life data link is responsible for the transfer of data everywhere the channel and finally the physical layer which handles physical signaling, including connectors, timing, voltages, and another(prenominal) matters all this make up protocols for WAN.

Some WAN protocols concord frame relay, High-Level Data Link Control (HDLC), and leg to point protocol. The layer of the OSI reference model that switches and routers operate in is the network layer; these are hardware devices that assist in addressing and routing between sub-networks which is the definition of the network layer of the OSI reference model. A brouter (short for a bridge router) would fall under two layers, data lin k and network because it can distinguish non! -routable protocols and forward them to the while network therefore touching on being a data link. Reference Regan, P. (2004). Wide Area Networks (1st ed.). Upper shoot down River, NJ: Prentice Hall.If you want to get a estimable essay, clubhouse it on our website: BestEssayCheap.com

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