Discuss the role of routers and switches in the context of the OSI model, and how they operate at different layers
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Discuss the role of routers and switches in the context of the OSI model, and how they operate at different layers.
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- How do protocols transfer across OSI layers?Explain the OSI layer's operation and its seven protocols.An entry in the switching table of a virtual-circuit network is normally created during the setup phase and deleted during the teardown phase. In other words, the entries in this type of network reflect the current connections, the activity in the network. In contrast, the entries in a routing table of a datagram network do not depend on the current connections; they show the configuration of the network and how any packet should be routed to a final destination. The entries may remain the same even if there is no activity in the network. The routing tables, however, are updated if there are changes in the network. Can you explain the reason for these two different characteristics? Can we say that a virtual-circuit is a connection oriented network and a datagram network is a connectionless network because of the above characteristics?
- Explain in detail about the addressing and routing techniques in the communication network. You are required to provide any suitable illustration to support your explanation.Describe each of the OSI model's seven levels, including the seven sublayers, as well as the protocols that function at each level.How does a switch function in the context of the OSI model, and what layer does it primarily operate at?
- What are the distinctions between the various layers of the OSI model when routers are present at multiple layers?Describe each of the OSI model's seven le the protocols that function at each level.Despite the OSI model's insistence on seven distinct levels, this is not usually the case in actual network architectures. Reduced layer counts help for what reasons? Which possible downsides are associated with using a lower number of layers?