December 1999
NI222 : NETWORKS AND THE INTERNET

QUESTION 4

Total Marks: 15 Marks

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SUGGESTED SOLUTIONS
for Question 4

(a)

What are the two primary services provided by the Internet protocol?

 

 [2]
(b)

Distinguish between the Bellman Ford routing algorithm and Dijkstra ’s routing algorithm.Of what sort of routing algorithm are they both examples?

 

 [4]
(c)

Explain how flooding routing technique works.What is meant by selective .ooding?In general under what circumstances is this technique useful?

 

 [4]
(d)

IP addresses are divided into class A,B,and C types of addresses:


(i)What class of IP address do you suggest for a LAN with less than 250 computers connected together and why?[2 marks ]
(ii)How do you identify a class B IP address?[1 mark ]
(iii)In the class AIP address 125.100.10.1,identify the network part and host part of the address.Explain your answer.[2 marks ]

 [5]