WhataretworeasonstoimplementH·323gatekeepers?()
A.toeliminatetheneedforVoIPgateways
B.toscaleaVoIPinstallationwithmultiplegateways
C.toprovidecalladmissioncontrolandlimitthenumberofsimultaneouscallsonthenetwork
D.tomeettherequirementtocontrolH·323gatewaysonaLAN
E.toacceptcallrequestsandreducetheloadonthegateway