What should be monitored within 15 minutes according to the monitoring requirements?

The correct answer relates to the requirement for monitoring unauthorized access points within a 15-minute timeframe. This is crucial for maintaining the security posture of critical infrastructure facilities, particularly in the context of NERC's Critical Infrastructure Protection standards, which emphasize the importance of rapid detection and response to potential security incidents. Unauthorized access points are vulnerabilities that, if exploited, could lead to disruptions in operations or breaches of sensitive data. Therefore, timely monitoring allows for swift action to mitigate threats before they escalate.

In contrast, while visitor entry logs, real-time monitoring data, and staff communication records are all important components of overall facility security, they do not have the same immediacy in terms of monitoring requirements. Visitor logs may not need real-time attention as they reflect historical data rather than immediate threats. Real-time monitoring data could encompass a wide array of information, but specific actionable monitoring of access points is prioritized. Staff communication records may assist in understanding the context of incidents but do not pertain as directly to immediate physical security threats as access point monitoring does.