Posted: April 3rd, 2021

Consider a short 10-meter link, over which a sender can transmit at a rate of 150 bits/sec in both directions. Suppose that packets containing data are 100,000 bits long, and packets containing control (e.g., ACK or handshaking) are 200 bits long. Assume that N parallel connections each get 1 N of the link bandwidth. Now consider the HTTP protocol, and suppose that each download object is 100 Kbits long, and that the initial download object contains 10 referenced objects from the same sender. Would parallel downloads via parallel instances of non-persistent HTTP make sense in this case? Now consider persistent HTTP. Do you expect significant gains over the non-persistent case? Justify and explain your answer.

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