Answer:
a. Host A will retransmit neither segments
Explanation:
The options are:
a. Host A will retransmit neither segments
b. Host A will retransmit first segment
c. Host A will retransmit the second segment
d. Host A will retransmit both segments
The first acknowledgment is lost but the second acknowledgment arrives before the timer of the first segment expires, and hence the host A gets confirmation that Host B has received both the segments. And hence Host A will retransmit neither segments.
The thing which host A would do after the first acknowledgement is lost is:
According to the given question, we are asked to show what host A would do after the first acknowledgement is lost and the second acknowledgement arrives before the timer for the first segment expires.
As a result of this, we can see that when he first acknowledgement is lost, but the second acknowledgement arrives before the timer for the first segment expires, then host A would retransmit neither segments.
Therefore, the correct answer is option A
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