With persistent HTTP, all objects are sent over the same TCP connection. As we discussed in…

With persistent HTTP, all objects are sent over the same TCP connection. As we discussed in Chapter 2, one of the motivations behind persistent HTTP (with pipelining) is to diminish the affects of TCP connection establishment and slow start on the response time for a Web page. In this problem we investigate the response time for persistent HTTP. Assume that the client requests all the images at once, but only when it has it has received the entire HTML base page. Let M+1 denote the number of objects and let O denote the size of each object.

With persistent HTTP, all objects are sent over the same TCP connection. As we discussed in Chapter...-1

Note that K' is the number of windows that cover an object of size (M+1)O and P' is the number of stall periods when sending the large object over a single TCP connection. Suppose (incorrectly) the server can send the images without waiting for the formal request for the images from the client. Show that the response time is that of sending one large object of size (M+1)O:

With persistent HTTP, all objects are sent over the same TCP connection. As we discussed in Chapter...-2

c) The actual response time for persistent HTTP is somewhat larger than the approximation. This is because the server must wait for a request for the images before sending the images. In particular, the stall time between the Kth and (K+1)st window is not [S/R + RTT – 2K-1(S/R)]+ but is instead RTT. Show that

With persistent HTTP, all objects are sent over the same TCP connection. As we discussed in Chapter...-3

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