Homework2_1

Homework2_1 - 1 List five tasks that a layer can perform It...

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1) List five tasks that a layer can perform. It is possible that one (or more) of these tasks could be performed by two (or more) layers? Five generic tasks are error control, flow control, segmentation and reassembly, multiplexing, and connection setup. Yes, these tasks can be duplicated at different layers. For example, error control is often provided at more than one layer. 2) What are the five layers in the Internet protocol stack? What are the principle responsibilities for each of these layers? The five layers in the Internet protocol stack are – from top to bottom – the application layer, the transport layer, the network layer, the link layer, and the physical layer. The principal responsibilities are outlined in Section 1.7.1. 3) Which layers in the Internet protocol stack does a router process? Routers process layers 1 through 3. (This is a little bit of a white lie, as modern routers sometimes act as firewalls or caching components, and process layer four as well.) Link layer switches process layers 1 through 2. Hosts process all five layers.
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Homework2_1 - 1 List five tasks that a layer can perform It...

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