Chapter15 - Simulation of Computer Networks A.M Zareh...

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١ Simulation of Computer Networks A.M. Zareh Bidoki ٢ Computer Networks ± A distributed environment ² Millions of nodes are connected to each other ± Why its successful? ² Simplicity ² It is a multilayered system ± Open System Interconnection Network (OSI) model ² Each layer provide certain services and guarantees to layer above
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٢ ٣ Computer Networks ± An application or protocol at particular layer communicates directly with corresponding layer ± Different layers encapsulate different levels of communication abstraction ٤ OSI Model ± Physical Layer ± Data Link Layer ± Network Layer ± Transport Layer ± Session Layer ± Presentation Layer ± Application Layer
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٣ ٥ Physical Layer ± Bit steam signals ± Fiber Optic, Wireless, Bus ٦ Data Link Layer ± Error detection ± Frame based ± Access control (Simulation can be used!) ² Tradeoffs between access control & techniques ² A time shared medium
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٤ ٧ Network Layer ± Packet based ± Routing across subnets ±
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Chapter15 - Simulation of Computer Networks A.M Zareh...

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