P3. In Section 4.2 , we noted that the maximum queuing delay is (n–1)D if the switching fabric is n times faster than the input
line rates. Suppose that all packets are of the same length, n packets arrive at the same time to the n input ports, and all n packets want to be forwarded to different output ports. What is the maximum delay for a packet for the (a) memory, (b) bus, and (c) crossbar switching fabrics?
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