Consider a 40,000 km link, over which a sender can transmit at a rate of 10 Mbps in both directions. Suppose that packets containing data are 10 Kbit bytes long, and packets containing only control (e.g., ACK or handshaking) are 100 bits long. Suppose the propagation speed over the link is 2 108 meters/sec. Assume that N parallel connections each get 1/N of the link bandwidth.

a) Now consider the HTTP protocol, and suppose that each downloaded object is 10 Kbits long, and that the initial downloaded object contains 12 ref- erenced objects from the same sender. How long does it take for the parallel non-persistent connections to download the objects (initial and reference)? (As- suming end system processing time can be ignored.)

Solved: 10.41339 seconds

b) In the above scenario, how long does it take for a persistent HTTP connection to download the objects (initial and reference)? (Assuming end system processing time can be ignored.)

Solved: 5.6132 seconds

c) In the above scenario, how long does it take for four parallel persistent HTTP connections to download the objects (initial and reference)? (Assuming end system processing time can be ignored.)

I only need a solution to part c)