WhichtwostatementsabouttheimplementationofWLANQoSaretrue?()

A.The802.11estandardistheIEEE802.11OoSWLANstandard.

B.TheWi-FiMultimedia（WMM）standarddecreasestheeightprioritylevelstofouraccesscategories.

C.TheWi-FiMultimedia（WMM）standardisaWi-FiAlliancestandardthatincreasesthefourprioritylevelstoeightaccesscategories.

D.TheWi-FiMultimedia（WMM）standardisanIEEEstandardthatincreasesthefourprioritylevelstoeightaccesscategories.

E.Wireless802.11deploysDistributedCoordinationFunction（DCF），carriersensemultipleaccesswithcollisiondetection（CSMA/CD），interframespacing，andrandomwaittimerstoavoidcollisions.

F.WirelessOoSdesignsandimplementationscommonlyuseLayer3differentiatedservicescodepoint（DSCP）orLayer2802.1ptoensurepriority