Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging
wireless network infrastructure, as well as some clients, to support 802.11n. In your research, you have
discovered that your new wireless client devices and infrastructure are 802.11n, WMM, and WMM-PS
certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not
support WMM.
Given this information, what scenario is possible when your company’s employees begin using both types
of client devices on the new WLAN?

A.
All WMM-PS certified client devices will be prevented from utilizing WMM-PS features until all stations in
use on the wireless medium are WMM-PS certified.

B.
The WLAN infrastructure will set the dozing times of the WMM-PS certified client devices based upon
their WMM access category, while the non-WMM-PS client devices will continue to use PS- Poll frames.

C.
Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices
when used with applications that support WMM-PS.

D.
WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the trigger- anddelivery mechanism, but WMM-PS stations will get priority.

E.
When all STAs are using Power Save features, WMM-PS STAs will experience poor performance due
to PS protection mechanisms.