Over a TCP connection, suppose host A sends two segments to host B, host B sends an acknowledgement for each segment, the first acknowledgement is lost, but the second acknowledgement arrives before the timer for the first segment expires. What will host A do

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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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.

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