WhichdescriptionsofNetflowiscorrect?()

A.Bydefault，NetflowrecordsbidirectionalIPtrafficflow.

B.NetflowanswersquestionsregardingIPtraffic：who，what，where，when，andhow

C.Netflowaccountsforbothtransittrafficandtrafficdestinedfortherouter.

D.Netflowreturnsthesubinterfaceinformationintheflowrecords.