What main component of an alarm system logs events for later review?

The control panel is a crucial component of an alarm system that manages and logs events for later review. It acts as the central hub that receives information from various components such as sensors and cameras. When an event occurs, such as a door opening or motion detected by a sensor, the control panel records this data, including timestamps and event details, creating a comprehensive log that can be reviewed later. This logging capability is essential for investigating incidents, analyzing responses, and understanding patterns in security breaches or false alarms.

Other components like speakers, sensors, and cameras serve specific functions in the alarm system—speakers typically provide audible alerts, sensors detect intrusions or anomalies, and cameras capture video footage. However, none of these components are responsible for event logging, which highlights the pivotal role of the control panel in maintaining a historical record of events for security analysis.