Suppose nodes A and B are on the same 10 Mbps Ethernet segment and the propagation...

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Suppose nodes A and B are on the same 10 Mbps Ethernet segment and the propagation delay between the two nodes is 225 bit times. Suppose A and B send frames at the same time, the frames collide, and then A and B randomly choose their own values of K in the CSMA/CD algorithm. Assuming no other nodes are active, can 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= 225 bit times. They finish transmitting a jam signal at t=225+48=273 bit times. Suppose K=0 and K=1. A Hints: Note that the random backoff component of scheduling delay is K* 512 bit times. Also note that the minimum Ethernet frame size is 512 bits. a) At what time does B schedule its retransmission (in bit times)? b) At what time does A begin transmission (in bit times)? c) At what time does A's signal reach B? d) Does B refrain from transmitting? Suppose nodes A and B are on the same 10 Mbps Ethernet segment and the propagation delay between the two nodes is 225 bit times. Suppose A and B send frames at the same time, the frames collide, and then A and B randomly choose their own values of K in the CSMA/CD algorithm. Assuming no other nodes are active, can 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= 225 bit times. They finish transmitting a jam signal at t=225+48=273 bit times. Suppose K=0 and K=1. A Hints: Note that the random backoff component of scheduling delay is K* 512 bit times. Also note that the minimum Ethernet frame size is 512 bits. a) At what time does B schedule its retransmission (in bit times)? b) At what time does A begin transmission (in bit times)? c) At what time does A's signal reach B? d) Does B refrain from transmitting?

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Lets work through the scenario step by step Given Propagation delay between A and B is 225 bit times ... View the full answer