CWNA: Certified Wireless Network Administrator v109 — Question 12

You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?

Answer options

• A. The clients are only two stream 802.11ax clients
• B. The clients are 802.11n devices
• C. Non-Wi-Fi interference in the channel
• D. Contention caused by an overlapping BSS

Correct answer: A

Explanation

The correct answer is A because if the clients are only two-stream 802.11ax devices, they would be limited to lower data rates compared to the four-stream capability of the AP. Option B is incorrect as 802.11n devices would typically support higher rates than 150 Mbps. Options C and D relate to interference and contention issues, which do not directly limit the data rate based on the client's capabilities.