help please! Suppose node A and B are on the same 10Mbps Ethernet bus, and the p

Question

help please!

Suppose node A and B are on the same 10Mbps Ethernet bus, and the propagation delay between the two nodes is 325 bit times. Suppose node A begins transmitting a frame and, before it finishes, node B begins transmitting a frame. Can A finish transmitting before it detect that B has transmitted? Why or why not? Hint: suppose at time t = 0 bit times, A begins transmitting a frame. In the worst case, A transmits a minimum-sized frame of 512+64 bit times. So A would finish transmitting the frame at t = 512+64 bit times. Thus, the answer is no. if B's signal reaches A before bit time t = 512+64bits In the worst case, when does B's signal reach A?

Explanation / Answer

The Correct answer is YES

Reason:

The minimum packet size of A is 512.

Also, there is a propagation delay of 325 bit times.

so, the total time taken by B's message to reach is atleast (512+325) bit times, which is obviously more than( 512+64 ).

So, A will finish transmitting before it detect that B has transmitted.

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