Advanced
Computer Networks
Q81 / 100
What is TCP's Fast Retransmit mechanism?
Correct! Well done.
Incorrect.
The correct answer is B) After receiving 3 duplicate ACKs (indicating a gap in sequence), the sender retransmits the suspected lost segment without waiting for the timeout
B
Correct Answer
After receiving 3 duplicate ACKs (indicating a gap in sequence), the sender retransmits the suspected lost segment without waiting for the timeout
Explanation
3 duplicate ACKs = receiver got something out of order. Fast retransmit sends the missing segment immediately. Combined with Fast Recovery (halve cwnd instead of resetting to 1) for efficiency.
Progress
81/100