Which function best describes the role of SIEM in real-time cyber defense?

Which function best describes the role of SIEM in real-time cyber defense?

• A. Aggregates logs, correlates events, and supports real-time detection and incident response.
• B. Primarily stores backup data offline for regulatory compliance.
• C. Routes traffic between networks to optimize performance.
• D. Replaces the need for endpoint security.

Answer: (A)

SIEM in real-time cyber defense centers on aggregating logs from diverse sources, correlating events across them, and enabling real-time detection and incident response. By collecting data from firewalls, IDS/IPS, endpoints, servers, and cloud services, SIEM normalizes information and runs correlation rules that reveal multi-step attacks or unusual patterns that individual sources might miss. When a correlation triggers, it generates alerts with rich context, helping analysts investigate and respond quickly. It also preserves historical data for investigations and compliance, but its primary value in real-time defense is turning disparate events into actionable alerts and coordinated responses. The other options describe offline backups, traffic routing, or replacing endpoint security—functions outside the SIEM’s role.

SIEM in real-time cyber defense centers on aggregating logs from diverse sources, correlating events across them, and enabling real-time detection and incident response. By collecting data from firewalls, IDS/IPS, endpoints, servers, and cloud services, SIEM normalizes information and runs correlation rules that reveal multi-step attacks or unusual patterns that individual sources might miss. When a correlation triggers, it generates alerts with rich context, helping analysts investigate and respond quickly. It also preserves historical data for investigations and compliance, but its primary value in real-time defense is turning disparate events into actionable alerts and coordinated responses. The other options describe offline backups, traffic routing, or replacing endpoint security—functions outside the SIEM’s role.