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Difficulty: EasySNMP Operations, MIBs, Traps, Informs, and Version Differences

A network engineer wants to configure managed switches to alert the SNMP management station upon link status changes. To prevent missed alerts due to unacknowledged packet delivery, the engineer requires a message type that mandates an explicit confirmation receipt back from the manager. Which SNMP message type should be configured on the switches?

  1. A
    SNMP Trap
  2. SNMP InformRequestAnswer
  3. C
    SNMP GetNextRequest
  4. D
    SNMP SetRequest

Answer

SNMP InformRequest (or Inform) is the correct message type because it requires an explicit acknowledgement receipt from the receiving SNMP manager.
SNMP InformRequest messages are specifically designed to provide reliable notification handling. Unlike standard Traps, when an agent sends an Inform, the receiver must reply with an acknowledgement; if no confirmation is received, the agent can retransmit the alert.

Step-by-Step Solution

1
Identify the operational requirement in the scenario.
The requirement is an event alert notification originating from network switches that provides reliable delivery through mandatory receiver acknowledgement.
Event-driven notifications initiated by managed devices are either Traps or Informs.
2
Compare SNMP Trap and SNMP InformRequest operational mechanics.
Traps are unacknowledged (fire-and-forget), whereas Informs require the manager to send an SNMP response acknowledging receipt.
If an Inform message is not acknowledged by the NMS within a timeout period, the sending device can retransmit the notification.

Key Concept

SNMP Traps vs SNMP Informs Reliability Mechanics
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Topics

SNMP Operations, MIBs, Traps, Informs, and Version Differences

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