Suppose two hosts, A and B, are separated by 40,000 kilometers and are connected by a direct link of R = 2 Mbps. Suppose the signal propagation speed over the link is 2.0 * 10^8 meters/sec.

a. Calculate the bandwidth-delay product, R * dprop.

b. Consider sending a file of 800,000 bits from Host A to Host B. Suppose the file is sent continuously as one large 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. Assume that RTT (Round Trip Time) is 2 times the propagation delay. Calculate the bandwidth-RTT product, R * RTT. Provide an interpretation of the bandwidth-RTT product.