Which three statements about the features of SNMPv2 and SNMPv3 are true? (Choose
three.)

A.
SNMPv3 enhanced SNMPv2 security features.

B.
SNMPv3 added the Inform protocol message to SNMP.

C.
SNMPv2 added the Inform protocol message to SNMP.

D.
SNMPv3 added the GetBulk protocol messages to SNMP.

E.
SNMPv2 added the GetBulk protocol message to SNMP.

F.
SNMPv2 added the GetNext protocol message to SNMP.

Explanation:

SNMPv1/v2 can neither authenticate the source of a management message nor provide
encryption. Without authentication, it is possible for nonauthorized users to exercise SNMP
network management functions. It is also possible for nonauthorized users to eavesdrop on
management information as it passes from managed systems to the management system.
Because of these deficiencies, many SNMPv1/v2 implementations are limited to simply a
read-only capability, reducing their utility to that of a network monitor; no network control
applications can be supported. To correct the security deficiencies of SNMPv1/v2, SNMPv3
was issued as a set of Proposed Standards in January 1998. -> A is correct.
The two additional messages are added in SNMP2 (compared to SNMPv1)
GetBulkRequest The GetBulkRequest message enables an SNMP manager to access large
chunks of data. GetBulkRequest allows an agent to respond with as much information as will
fit in the response PDU. Agents that cannot provide values for all variables in a list will send
partial information. -> E is correct.
InformRequest The InformRequest message allows NMS stations to share trap information.
(Traps are issued by SNMP agents when a device change occurs.) InformRequest
messages are generally used between NMS stations, not between NMS stations and
agents. -> C is correct.
Note: These two messages are carried over SNMPv3.