This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking. Consider two hosts, A and B

$,$

$$connected by a single link of rate R bps

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$$Suppose that the two hosts are separated by m meters, and suppose the propagation speed along the link is s meters

$/$

sec

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$$Host A is to send a packet of size L bits to Host B

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$$

a

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$$Express the propagation delay, dprop, in terms of m and s

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