Question

An incoming internet webpage contains four images,one applet, and three images embedded within the applet. How many RTTs does it take to download all objects in the webpage(include the webpage download as part of your answer)

a. using persistent HTTP with pipelining?

b. using persistent HTTP without pipelining?

c. using non-persistent HTTP?

d. In terms of the sender window, what is the difference between pipelining in HTTP and pipelining at the transport layer, such as in Go-Back-N or SR?

Answer 1

(d). There is no sender window with HTTP. No sender window is required with HTTP as it is pull-based protocol. Whereas, sender window is required in transport layer and has a limited size.