subject : data communication and network

Question 5 Topology refers to the geometric arrangement of devices on a network. Local Area Networks (LANs) appear in one of three topologies: linear, ring, or star. Larger networks can be a combination of two or more of these. (a) In a physical bus topology, why do the ends of the cable have to be terminated? (5 marks) (b) What is a token ring network, and how does it work? (5 marks) (c) Briefly explain why it is important to understand logical topologies. (5 marks) (d) Explain the two techniques of data forwarding in Ethernet switches. (10 marks)