A network engineer is planning how the monitoring platform will collect environmental data from several rack-mounted switches running Linux-based firmware. The design must:
Avoid periodic polling and minimize bandwidth
Use the standard MIB object identifiers already supported by the monitoring software
Allow the monitoring server to listen passively on UDP port 162 for incoming messages
Which data acquisition method on the switches BEST meets these requirements?
Install a Prometheus node exporter agent to push metrics.
Create HTTPS webhook callbacks to the monitoring server.
Configure the switches to send SNMP trap notifications.
Set up agentless SNMP polling using periodic GET requests.
SNMP traps are unsolicited, asynchronous notifications sent by an SNMP agent to an SNMP manager when a predefined event occurs, such as a temperature threshold being exceeded. Because the device pushes the message, no polling traffic is generated, which satisfies the bandwidth requirement. Traps carry OIDs defined in the device's MIB so the monitoring application can interpret the data, and by default they are delivered to the manager on UDP port 162.
SNMP polling with GET or GETNEXT is agentless but still relies on the manager initiating regular queries, consuming bandwidth. Webhooks use HTTP(S) rather than SNMP and have no concept of MIB-based OIDs. A Prometheus node exporter agent pushes metrics over HTTP and also does not use SNMP or UDP 162; it requires installing an additional exporter service rather than leveraging the switch's built-in SNMP implementation.
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CompTIA Linux+ XK0-006 (V8)
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