Data Communication and Computer

Networks question.

A radio is called full-duplex if it can both transmit and receive simultaneously. A

radio is called half-duplex if it can either transmit or receive but cannot do both

simultaneously. Consider a protocol between a sender node A and a receiver node B,

where each node is equipped with a half-duplex radio. The protocol allows A to

transmit periodically with a period of 100ms. That is, after every 100ms node A

transmits a frame to node B. It takes 2ms for A to transmit each frame. As soon as the

complete frame is received at B, it sends a piggybacked acknowledgement (ACK) to

A. The transmission time of each piggybacked ACK is also 2ms. Assume a

propagation delay of 0 in each direction. Also assume that no transmission fails.

(a) What is the channel utilization at sender node A?

(b) What is the channel utilization at receiver node B?