a. Describe and compare the priority mechanism of: (6 Marks)
i. Ethernet (802.3)
ii. Token Ring (802.5)
b. Packet switching, in contrast to circuit switching has gradually grown to dominate data
i. State and describe two disadvantages of packet switched networks (2 Marks)
ii. State two disadvantages of circuit switched networks. (2 Marks)
iii. Differentiate between datagram and virtual circuit approaches in packet switching.
c. Using Dijkstra’s shortest path algorithm, determine the shortest distance and shortest path from A
to F. (Start the algorithm from node A). Show your work. (5 Marks)
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