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Computer networks

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Consider sending a file of 2Mbits from Host A to Host B. There are three links and two store-and-forward routers (or switches) between A and B. Assume that no link is congested (that is, no queueing delays), and the one-way propagation delay of each link is 10ms. Host A divides this file into packets of S bits each and adds 100 bits of header to each packet, forming packets of L = 100 + S bits overall. Each link has a transmission rate of R =1Mbps. Find the value of S (in bits) that minimizes the delay of moving this file from Host A to Host B (end-to-end delay).

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