单项选择题

A.Real-timeframeexchangeisaccomplishedwithintheaccesspoint.
B.ThecontroltrafficbetweentheclientandtheaccesspointisencapsulatedwiththeLWAPP.
C.Authentication,security,andmobilityarehandledbytheaccesspoint.
D.DatatrafficbetweentheclientandtheaccesspointisencapsulatedwithLWAPP.
E.Noneoftheotheralternativesapply