Question: Let Tt be the expected transmission time for sending a data frame. Let Tf be the feedback transmission time for sending an ack or a

Let Tt be the expected transmission time for sending a data frame. Let Tf be the feedback transmission time for sending an ack or a nack frame. Let Td be the expected propagation and processing delay in one direction (same in each direction).

a. Find the expected time T between successive frame transmissions in a stop-and-wait system (assume there are no other delays and no frames are lost).

b. Let pt the probability of frame error in a data frame (independent of frame length) and pf the probability of error in a feedback ack or nack frame. Find the probability q that a data packet is correctly received and acked on a given transmission. What is the expected number of times a packet must be transmitted in a stop and wait system (assume independent errors on all frames).

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