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 readonly 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.