WhichstatementabouttheLightweightAccessPointProtocol（LWAPP）istrue？（）
A.LWAPPencryptsbothcontroltrafficanduserdata.
B.LWAPPencryptsusertrafficwithanx.509certificateusingAES-CCMP.
C.WhensettoLayer3，LWAPPusesaproprietaryprotocoltocommunicatewiththeCiscoAironetAPs.
D.LWAPPencryptscontroltrafficbetweentheAPandthecontroller.
E.Noneoftheotheralternativesapply.