December 1999
AN215 : ADVANCED NETWORKING

QUESTION 2

Total Marks: 15 Marks

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SUGGESTED SOLUTIONS
for Question 2

(a)

What are the benefits of using layered architectures in networking?

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(b)

The TCP/IP protocol suite is based around a four-layer model.Name each layer,and provide a suitable example of a protocol or network used in each layer.

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(c)

OSI and TCP/IP both describe layered protocols for host-to-host communication. Could TCP/IP be said to be an implementation of the OSI reference model?Explain your answer.

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(d)

 Which layer of the OSI reference model deals with internal data representation issues of communicating systems?If this layer were absent (as it is in TCP/IP)which layer would perform this function?What would happen if no layer performed this function?

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