Exam N10-008 topic 1 question 157 discussion

C. Set up the AP to perform a dynamic selection of the frequency according to regulatory requirements: If the AP is not allowing manual configuration, it is likely that the frequency range is being restricted by regulatory requirements or other limitations of the AP. By setting the AP to perform dynamic selection, it will automatically choose the best frequency and channel available based on the regulatory domain and available channels.

Apart from C, other options options can't be performed for the 'AP being tested'. Options A and B require the 'AP being tested' to be replaced. And the Option D means deactivating the 5Ghz which I think you can't do for the 802.11ac standard as the 2.4Ghz is not available on this standard. that leaves us with only the Option C which is do-able. But the comment from famco on this thread is very correct that it wants to test whether we know that there are certain channels reserved for Govt. use only.

If you already assumed that the AP only showed the regulatorily allowed ranges and still it was not allowing to select them, you are going to get the answer wrong.

C. Set up the AP to perform a dynamic selection of the frequency according to regulatory requirements It is the best option in this scenario because the AP is not allowing the administrator to manually configure a large portion of the 5GHz frequency range. This could be due to regulatory requirements that limit the use of certain frequencies in certain areas. By setting up the AP to perform a dynamic selection of the frequency according to regulatory requirements, the administrator can ensure that the AP is using only the frequencies that are legally allowed in the area.

Answer is C: DFS When emissions from radar systems are detected, clients and devices associated with Wi-Fi access points (APs) dynamically switch to a new operating channel. Generally, DFS provides a better user experience, especially in dense deployments where multiple neighboring Wi-Fi APs are present.