CWNA: Certified Wireless Network Administrator v107 — Question 31

You are troubleshooting a WLAN problem and you suspect hidden node as the cause. What should you look for in a protocol analyzer?

Answer options

• A. Frames with the HN bit set to 1
• B. Frames with the retry bit set to 0
• C. Frames transmitted from the AP without acknowledgement
• D. Retransmitted frames from multiple STAs at higher rates than other STAs

Correct answer: D

Explanation

The correct answer is D because hidden node scenarios often lead to increased retransmissions as multiple STAs attempt to communicate simultaneously without knowledge of each other, causing performance issues. Option A is incorrect because the HN bit is not a standard indicator of hidden node problems. Option B is irrelevant as frames with the retry bit set to 0 do not indicate hidden node issues, while option C does not specifically relate to hidden nodes but rather to general communication failures.