You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5
GHz network. The laptops do not show the 5 GHz SSIDs, which are different than the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?
If the laptops can connect to the 2.4 GHz network but not to the 5 GHz network, and other devices are connecting to the 5 GHz network without issue, the most likely problem is with the laptops themselves. Given that all four laptops are behaving the same way, it's reasonable to conclude that the issue is likely related to their drivers. Faulty drivers can prevent the operating system from recognizing or properly interacting with the wireless adapters, especially for different frequency bands, which would explain why they do not show the 5 GHz SSIDs.
Option C is wrong, as DoS attacks have no impact on whether the laptops STA can or cannot connect with the APs. Options A and D are wrong because if any of these were the case, all devices would be affected, and not only the laptops in question. Thus Option B is correct.
Think they key is they are saying other devices can connect fine. It must then be a problem with the purchased laptops. So my answer would be B.
The answer is B.
Debatable
I think it's B