CWNA: Certified Wireless Network Administrator v108 — Question 9

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

Answer options

• A. Each AP responds in turn after preparing a probe response and winning contention.
• B. For each probe request frame, only one AP may reply with a probe response.
• C. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
• D. After waiting a SIFS, all APs reply at the same time with a probe response.

Correct answer: A

Explanation

The correct answer is A because when a client sends a broadcast probe request, multiple APs can respond, but they do so sequentially after winning contention. Option B is incorrect as it suggests only one AP can reply, which is not the case. Option C is misleading since APs do not check with a DHCP server for this scenario. Option D is incorrect because APs do not respond simultaneously; they take turns based on contention.