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Suppose nodes A and B are on the same 10 Mbps Ethernet bus, and the propagation delay between the two nodes is 245 bit times. Suppose A and B send frames at the same time, the frames collide, and then A and B choose different values of K in the CSMA/CD algorithm. Assuming no other nodes are active, can the retransmissions from A and B collide? For our purposes, it suffices to work out the following example. Suppose A and B begin transmission at t=0 bit times. They both detect collisions at t=245 bit times. They finish transmitting a jam signal at t = 245 + 48 = 293 bit times. Suppose KA=0 and KB= 1. At what time does B scheduleits retransmission? At what time does A begin transmission? (Note: The nodes must wait for an idle channel after returning to Step 2, see protocol.) At what time does A's signal reach B? Does B refrain from transmitting at its scheduled time?
You have to create your own message format and provide IDs in any way you want. At minimum message should have source address, destination address, TTL and address of sending node etc.
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