A stop-and-wait protocol implementation is not receiving acknowledgments and keeps resending the same packet. What is the most likely cause?

medium📝 Analysis Q14 of 15

Computer Networks - Physical and Data Link Layer

AThe sender is sending multiple packets at once

BThe sender window size is too large

CThe receiver is not sending acknowledgments

DThe network is using sliding window instead

Step-by-Step Solution

Solution:

Step 1: Analyze stop-and-wait behavior
Stop-and-wait waits for acknowledgment before sending next packet; no acknowledgment causes resending.
Step 2: Identify cause of no acknowledgment
If acknowledgments are missing, likely the receiver is not sending them or they are lost.
Final Answer:
The receiver is not sending acknowledgments -> Option C
Quick Check:
No acknowledgment = Resend same packet [OK]

Quick Trick: No ack means receiver not responding [OK]

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