the snmpModules there is again three subtrees: snmpMIB(1): This is the agent-to-manager interaction MIB - snmpM2M(2): This is the manager-to-manager MIB partyMIB(3): This has been removed from the SNMPv2 MIB in RFC 1907. There are subtrees below the above levels also and further levels below these subtrees. "snmpMIB" under snmpModules, has snmpMIBObjects and snmp- MIBConformance subtrees. Below the snmpMIBObjects, we have snmpTrap(4), snmpTraps(5), and snmpSet(6). Management Information Base (MIB) 16.6 SNMPv3 MIB SNMPv3 has many additional objects introduced to account for the new security features that were introduced like the user-based security model and view-based access control model. Some of the MIB modules present in the object hierarchy of SNMPv3 are: snmpFrameworkMIB: This is used to define the MIB module for SNMPv3 architecture. The subtrees under it in addition to snmpFrameworkConfor- mance are: snmpFrameworkAdmin: This is used for the registration of SNMPv3 authentication and privacy protocol objects. snmpFrameworkMIBObjects: This is used to define SNMP engine- related objects like: snmpEngineID snmpEngineTime snmpEngineBoots snmpEngineMaxMessageSize snmpMPDMIB: This has the MIB module for message processing and dispatching. The subtrees under it in addition to snmpMDPConfor- mance are: snmpMPDAdmin: This module is used for the registration of message processing and dispatcher objects. snmpMPDMIBObjects: This provides a collection of objects for collect- ing information like number of packets dropped. snmpProxyMIB: This module has objects used to remotely configure the parameters in a proxy forwarding application. The proxy objects in snmp- ProxyMIB are defined under snmpProxyObjects. snmpTargetMIB This module has objects that are used for defining the addresses, destinations, and transport domains of the targets. In addition to snmpTargetConformance, there is snmpTargetObjects. The snmpTargetOb- jects in snmpTargetMIB module has tables that capture information about the transport domains and security