Both SNMP Trap and Inform Request are used by managed devices to send alarms to the NMS. Inform Request requires an acknowledgment from the NMS, whereas Trap does not.

The statement accurately describes a key difference between SNMP Trap and Inform Request messages. Both are used by an SNMP agent (managed device) to asynchronously notify an NMS of an event. However, a Trap is an unconfirmed notification; the agent sends the message and does not expect a reply. An Inform Request is a confirmed notification; the agent sends the message and waits for an acknowledgment from the NMS. If no acknowledgment is received, the agent may resend the Inform Request. This confirmation mechanism makes Inform more reliable than Trap for critical notifications.

This is a True/False question. The statement is factually correct, so option A (True) is the only correct choice.

1. Huawei. (2020). HCIA-Datacom V1.0 Training Material (Model H12-811). Section: Network Management and O&M

Subsection: SNMP Protocol Basics

Chapter: SNMP Operations. (This chapter explicitly contrasts Trap and Inform

stating that Inform messages require acknowledgment from the NMS

unlike Trap messages).

2. Case

J.

Fedor

M.

Schoffstall

M.

& Davin

J. (1990). RFC 1157: A Simple Network Management Protocol (SNMP). Section 4.1.3

"The Trap-PDU." (Describes the unconfirmed nature of Traps).

3. Levi

D.

Meyer

P.

& Stewart

B. (2002). RFC 3416: Version 2 of the Protocol Operations for the Simple Network Management Protocol (SNMP). Section 4.2.7

"The InformRequest-PDU." (Defines the InformRequest and its requirement for a response PDU as acknowledgment).