December
1998 QUESTION 5 Total Marks: 20 Marks |
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| (a) | Briefly explain how, when sending out an IP
packet, the destination Ethernet address is determined.
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[6] |
| (b) | A modern approach to LAN
construction uses a LAN hub. Explain what this means, and how this topology has
elements of a star form and a bus form.
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[3] |
| (c) | What is the major modern competitor to
high-speed ethernets ? How do the capacities compare ? Describe one problem with this
alternative, and one benefit.
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[5] |
| (d) | Is it true that the shortest path between any two nodes must also be the most economical path ? Explain your answer. | [6] |