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(c) A legacy Ethernet network comprised of a hub with ten twisted-pair cables, each being 50 m long. The delay in the hub is 1 us. Assume that the speed of transmission is 1.77 x 108 ms-1. (i) Calculate the minimum collision window size required. Your answer should include a discussion as to what is meant by the collision window. (5 marks) (ii) The hub is now replaced by a switch and two of the twisted-pair cables were increased to 60 m each. Re-calculate the minimum collision window size required, giving reasons for your answer. (2 marks) (c) A legacy Ethernet network comprised of a hub with ten twisted-pair cables, each being 50 m long. The delay in the hub is 1 us. Assume that the speed of transmission is 1.77 x 108 ms-1. (i) Calculate the minimum collision window size required. Your answer should include a discussion as to what is meant by the collision window. (5 marks) (ii) The hub is now replaced by a switch and two of the twisted-pair cables were increased to 60 m each. Re-calculate the minimum collision window size required, giving reasons for your answer. (2 marks)