A.3 B.4 C.5 D.2 E.6
A.SNMP version 2 uses a proxy agent to forward GetNext message to SNMP version 3. B.SNMP version 2 supports message integrity to ensure that a packet has not been tampered with C.Proxy agents were used only in SNMP version 1. D.SNMP version 3 supports encryption and SNMP version 2 support authentication. E.GetBulk messages are converted to GetNext messages by the proxy agent and are then forwarded to the SNMP version 1 agent.
A.Default MDT groups are used for PIM control traffic, low-bandwidth sources, and flooding of sparse mode traffic. B.MDTs are built in customer networks C.Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs. D.MDTs are built in provider networks E.The number of MDTs depends on PIM modes of MDT groups.