WhichthreestatementsaretrueaboutTACACS＋?()

A.ItisaCiscoproprietaryprotocol.

B.ItrunsonTCPport59..

C.Authenticationandauthorizationaredoneatdifferentstages.

D.TACACS+encryptstheentirebodyofthepacket，butleavesastandardTACACS+header.

E.Itisanindustrystandardprotocol.

F.TACACS+encryptsboththeentirebodyofthepacketandtheTACACS+header.