What is a key feature of a Security Information and Event Management (SIEM) system?

A key feature of a Security Information and Event Management (SIEM) system is its ability to identify and respond to threats in real time. SIEM systems collect, analyze, and correlate security data from various sources within an organization's IT infrastructure. This includes logs from servers, firewalls, intrusion detection systems, and applications. By processing this information, a SIEM enables security teams to detect anomalies and potential security incidents as they occur. This real-time visibility allows organizations to respond swiftly to threats, mitigating potential damage and preventing security breaches before they escalate.

The other options do not capture this essential functionality of a SIEM. Although reduced hardware costs can be a side effect of optimizing security infrastructure, it's not a primary feature of a SIEM. Monitoring employee productivity is outside the primary scope of a SIEM, which focuses on security rather than workforce management. Similarly, facilitating user training sessions is not a function of SIEM systems; their main goal is to enhance security posture and incident response, not to provide training.