Question: I have an answer key for this practice question and its 680 microseconds but I don't know what the steps are, thank you. 7) (12

I have an answer key for this practice question and its 680I have an answer key for this practice question and its 680 microseconds but I don't know what the steps are, thank you.

7) (12 pts) Consider the hypothetical 20Mbps (20,000,000 bps) network shown The propagation delay between any two hosts ( A,B or a switch) is 20S. The frame to transmit from node A to node B consists of 4,000 bits. Each switch can start retransmission of a frame 10S after receiving the last bit of a frame. a) What is the time necessary to transmit the data as a single frame from A to B (time from the first bit of the frame transmitted by node A until last bit of the frame is received at node B)

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