Which term describes an unsolicited alert sent from an SNMP agent to the NMS when a threshold is crossed or a fault occurs?

Which term describes an unsolicited alert sent from an SNMP agent to the NMS when a threshold is crossed or a fault occurs?

• A. Syslog
• B. SNMP Poll
• C. Ping
• D. SNMP Trap

Answer: (D)

An SNMP trap is an asynchronous, unsolicited notification sent from an SNMP agent to the management system when a preset event occurs, such as a threshold being crossed or a fault happening. This lets the NMS know right away without having to poll for it. In contrast, an SNMP poll is when the NMS actively asks the agent for data on a schedule, so alerts aren’t sent unless there’s a direct poll response. Syslog is a general logging mechanism that can carry messages from devices but isn’t the SNMP alert method used to notify an NMS about SNMP-specific events. Ping simply checks reachability using ICMP and doesn’t convey SNMP event data to the NMS. So, the term that fits the description is SNMP Trap.

An SNMP trap is an asynchronous, unsolicited notification sent from an SNMP agent to the management system when a preset event occurs, such as a threshold being crossed or a fault happening. This lets the NMS know right away without having to poll for it. In contrast, an SNMP poll is when the NMS actively asks the agent for data on a schedule, so alerts aren’t sent unless there’s a direct poll response. Syslog is a general logging mechanism that can carry messages from devices but isn’t the SNMP alert method used to notify an NMS about SNMP-specific events. Ping simply checks reachability using ICMP and doesn’t convey SNMP event data to the NMS. So, the term that fits the description is SNMP Trap.