April 2000
NI222 : NETWORKS AND THE INTERNET

QUESTION 1 (Compulsory)

Total Marks: 30 Marks

• Question 2
• Question 3
• Question 4
• Question 5
• Cover Page

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SUGGESTED SOLUTIONS
for Question 1

(a)Explain each of the following terms;
(i)HTTP and HTML [2 marks ]
(ii)Domain Name System [2 marks ]
(iii)Anonymous FTP [2 marks ]

(b)Describe the three problems addressed by routers in wide-area networks.[3 marks ]

(c)What are the advantages of having a transport layer between network applications and the network layers?[3 marks ]

(d)Briefly describe the three major functions of the network layer.[3 marks ]

(e)What are the three types of ICMP Messages?[3 marks ]

(f)What are the advantages and disadvantages of having more layers rather than fewer layers in a network architecture?[4 marks ]

(g)Distinguish between logical and physical address used in networks.[4 marks ]

(h)The Internet user does not normally need to use IP addresses directly.Explain how symbolic names are used instead.[4 marks ]