Question

1. What are the reasons for using layered protocols? What are possible disadvantages of using layered protocols?

2. What are the impacts on the operations at layers k − 1 and k + 1, when,

                                                    i.     The algorithms used to implement the operations at layer k is changed.

                                                  ii.     The service (set of operations) provided by layer k is changed.

3. Imagine that there is a protocol which consists of 5 layers. Describe how a message from the top most layer of a sender machine would travel through the layers to the top most layer of a receiver machine. Write any reasonable assumptions made regarding the limitations of each layer.

4. Compare and Contrast the ISO OSI and TCP/IP reference models.​

Answer 1

Answer:

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