December 1999
NI222 : NETWORKS AND THE INTERNET

QUESTION 3

Total Marks: 15 Marks

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SUGGESTED SOLUTIONS
for Question 3

(a)

Explain briefly the role of the Transport layer in the ARPANET (Internet)four-layer architecture.

 

 [2]
(b)

What are the limitations of the TCP Protocol?

 

 [3]
(c)

Discuss the cost –performance trade-offs between the upward and downward multiplexing at the transport layer.

 

 [4]
(d)

Deadlock and Livelock are the problems encountered in setting up a TCP-style connection.For each,identify a protocol in which you might come across such problem and explain how with a suitable diagram.

 [6]