Question

Consider a client and a server connected through one router. Assume the router can start transmitting an incoming packet after receiving its first h bytes instead of the whole packet. Suppose that the link rates are R byte/s and that the client transmits one packet with a size of L bytes to the server. What is the end-to-end delay? Assume the propagation, processing, and queuing delays are negligible. Generalize the previous result to a scenario where the client and the server are interconnected by N routers.

Answer 1

As soon as h bytes out of L bytes of packet reach router it sends those h bytes forward. By the time these h bytes reach other router, another set of h bytes reach this router. Thus many transmissions takes place simultaneously.

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