August
1997 QUESTION 1 (Compulsory) Total Marks: 20 Marks |
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| 1. | (a) Describe three advantages of using a ring topology for a LAN. | [3] |
| (b) What is noise (in the context of data communications)? Explain two ways in which noise may arise. | [5] | |
| (c) What are two reasons for using layered protocols? | [4] | |
| (d) List two ways in which the OSI reference model and the TCP/IP reference model are the same, and two ways in which they differ. | [8] | |
| [In each part of this question at least half of the marks are offered for giving reasons for your answers.] |