Polled or Sent as a Trap?

About this interactive

Monitoring software gets data from devices in two directions, as the lesson says: sometimes it goes and grabs the information, and sometimes the device pushes it. Polling is the grab. The monitoring server asks each device for a value on its own schedule: CPU load every minute, memory every five minutes, the UPS battery level, the temperature in the closet. With SNMP, the server sends a request and the device answers. An SNMP trap is the push. The device sends a message by itself, unasked, when something happens: a port goes down, the UPS switches to battery, a fan fails. The video says that when SNMP is set up "we call them traps". Traps are only the device-initiated messages; the regular readings the monitor asks for are polling. Security+ lists SNMP traps among monitoring tools for exactly this push. The lesson also covers WMI for Windows, SSH for Linux and application APIs, and agentless monitoring (nothing installed) against agents, which give more detailed data.

What you'll learn

Tell polling, where the monitoring server asks a device for a reading on its own schedule, from an SNMP trap, which the device sends by itself when something happens
Recognize that regular readings such as CPU use, memory, battery level or temperature are polled, and that a trap reports an event the moment it occurs

Aligned to

CompTIA Security+

4.4 Explain security alerting and monitoring concepts and tools.

NIST NICE

K0848 Knowledge of network systems management principles and practices

K0849 Knowledge of network systems management tools and techniques

NIST 800-53

SI-4 System Monitoring

Key terms

Polling: A monitoring method that actively queries devices or systems to retrieve resource metrics such as CPU usage, RAM, or temperature.
SNMP Trap: An unsolicited alert message sent by a network device to a monitoring system when a specific event or threshold condition occurs.
Simple Network Management Protocol: A protocol used to monitor and manage network devices such as routers, switches, and servers.
Agentless Monitoring: A network monitoring approach that collects device data using existing protocols such as SNMP, WMI, or SSH without installing software on the monitored device.
Agent-Based Monitoring: A network monitoring approach that installs dedicated software agents on devices to collect and report more granular performance data to a central monitoring system.

Topics

Polling Snmp Network Monitoring Interactive Streak Sort

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