What is a key aspect of operational visibility during a security incident?

A key aspect of operational visibility during a security incident is continuously monitoring system performance metrics. This practice allows security analysts to gather real-time data about the health and status of systems, which is essential for detecting anomalies or changes that may signal a security breach. By keeping an eye on performance indicators, such as CPU usage, memory utilization, network traffic, and other relevant metrics, teams can identify unusual patterns or spikes that may indicate an ongoing attack or compromise. This kind of monitoring helps in quickly assessing the impact of an incident and responding effectively.

In contrast, the other choices focus on different aspects of security response. Reviewing network configurations tends to be more static, typically addressing preventative measures rather than real-time visibility. Identifying potential malware signatures is crucial for threat detection and mitigation, but it does not encompass the broader view of operational visibility during incidents. Lastly, while analyzing access controls is important for understanding who has access to what data and resources, it does not provide the same continuous, real-time insight into system operations that performance metrics do. Therefore, continuous monitoring of system performance metrics stands out as the crucial aspect for operational visibility during a security incident.