Network Engineering and Management question:

8. Suppose two hosts: A and B, are separated by 10,000 kilometers and are connected by a direct link of R = 1 Mbps. Suppose the propagation speed over the link is 2.5*100000000 meters/sec.

a. Calculate the bandwidth-delay product, R*T(prop).

b. Consider sending a file of 400,000 bits from host A to host B. Suppose the file is sent continuously as one big message. What is the maximum number of bits that will be in the link at any given time.

c. Provide an interpretation of the bandwidth-delay product.

d. What is the width (in meters) of a bit in the link? Is it longer than a football field?

e. Derive a general expression for the width of a bit in term of the propagation speed s, the bandwidth R, and the length of the link m.