4. Consider an ARQ algorithm running over a 40-km point-to-point fiber link.

a. Compute the one-way propagation delay for this link, assuming that the speed of light

is 2 x 10³ meters/s in the fiber.

b. Suggest a suitable timeout value for the ARQ algorithm to use.

c. Why might it still be possible for the ARQ algorithm to time out and retransmit a

frame, given this timeout value?