| (a) | List four factors to consider when deciding
which network topology to implement.
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[4] |
| (b) | In circuit switching there is a dedicated
communication pathway between two stations. Briefly describe the three phases involved in
this connection.
|
[6] |
| (c) | Below is a diagram of a typical network
topology, which assigns routes using the Datagram approach. There are four packets in the
message, which need to be sent from station A to station B. Assume that every packet moves
forward every turn, unless the node or the node in front is busy. The packet is then
stored in the queue and will only move on if the node or the node in front becomes free.
A sequence of events is shown below. Using this sequence, determine the final arrival order for the packets. Show all working, by indicating the location of each packet after every step listed below. 1. Packet 1 is sent from station A |
[10] |
