December 1999
NI222 : NETWORKS AND THE INTERNET

QUESTION 1 (Compulsory)

Total Marks: 30 Marks

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SUGGESTED SOLUTIONS
for Question 1

(a)

Explain each of the following terms:

(i)Remote Procedure Call [2 marks ]
(ii)Network Algorithm and Implementation [2 marks ]
(iii)Bridge and Router[2 marks ]

 

 [6]
(b)

Explain the role of the IETF in the Internet.

 

 [3]
(c)

Explain briefly three different types of addressing used in the various layers of the Internet.

 

 [3]
(d)

Briefly describe the three components of the Standard Email Architecture.

 

 [3]
(e)

Write down the protocol stack and TCP port addresses for Email,Web and FTP on the Internet.

 

 [3]
(f)

The following are examples of TCP service primitives.Identify which are request and which are confirm primitives,and explain the function of each.

•ACTIVE -OPEN -DATA
•STATUS
•FULL -PASSIVE -OPEN V
•DELIVER

 

 [4]
(g)

Explain the difference between the State and Event diagram that is used to represent the TCP connection establishment and termination.

 

 [4]
(h) Explain static and dynamic routing as used in the network layer. Include in your answer one advantage of each. [4]