Question

Give the times at which the value of ℎ

ssthresh changes (if it changes between
t=3 and t=4, use t=4 in your answer).
a. t=3
b. t=4
c. t=3 and t=4
d. No change in ℎ ssthresh

Answer 1

ℎ ssthresh changes at both t=3 and t=4. Option C is the answer.

Step-by-step explanation:

In TCP (Transmission Control Protocol), ℎ ssthresh (slow start threshold) changes under certain conditions. During normal operation, ℎ ssthresh changes when a timeout occurs or three duplicate acknowledgments are received. If there is a change in the network conditions, such as packet loss or congestion, the protocol may enter a congestion-avoidance phase, resulting in a modification of ℎ ssthresh.

As the question does not specify the cause of the change, we consider the general conditions, and it is common for ℎ ssthresh to change at both t=3 and t=4 in response to various events. Therefore, option c is the correct answer.

Option C is the answer.