SimpleNetworkManagementProtocol(SNMP)isanInternetStandardprotocolforcollectingandorganizinginformationaboutmanageddevicesonIPnetworksandformodifyingthatinformationtochangedevice().SNMPisacomponentoftheInternetProtocolSuiteasdefinedbytheInternet(请作答此空)TaskForce.SNMPoperatesinthe()layeroftheInternetprotocolsuite.AllSNMPmessagesaretransportedviaUser()Protocol.AnSNMP-managednetworkconsistsofthreekeycomponents:a)Manageddevices,b)()(i.e.，softwarewhichrunsonmanageddevices),andc)Networkmanagementstation(NMS)(i.e.，softwarewhichrunsonthemanager).
A.Managing
B.Controlling
C.Engineering
D.Researching
正确答案是C