August 2000
NI222 : NETWORKS AND THE INTERNET

QUESTION 4

Total Marks: 15 Marks

• Question 1
• Question 2
• Question 3
• Question 5
• Cover Page

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SUGGESTED SOLUTIONS
for Question 4

(a) Explain the purpose of the following fields within the IP Header Format. [4]
(i) Fragmentation flags
(ii) Time to live
(iii) Service type
(iv) Identification

(b) In terms of network service, explain what type of service the Internet Protocol provides. [2]

(c) Identify and explain the two basic types of routing provided by the Internet
Protocol, with an suitable example for each. [6]

(d) Following are the examples of IP addresses. Identify to which IP address class they belong to. Explain your answer. [3]
1. 160.50.50.50
2. 64.25.25.25
3. 208.75.75.75