Suppose two hosts, A and B, are separated by 2,000 km and are connected by a direct link of R = 2 Mbps. Suppose the propagation speed over the link is 2.5 x 10⁸ meter/sec. Note that 1M bits = 1,000,000 bits.

a. Calculate the propagation delay, d_prop.

b. Calculate the bandwidth-delay product, R x d_prop.

c. Now assume that the link bandwidth R = 100 Mbps. Calculate the bandwidth-delay product, R x d_prop.