Which control measure is most effective at ensuring that sensitive areas are monitored continuously?

Cameras are the most effective control measure for ensuring that sensitive areas are monitored continuously due to their ability to provide real-time visual surveillance. Unlike other measures, cameras can operate around the clock, recording activity and deterring unauthorized access through visible presence. They enable organizations to review footage in the event of an incident, allowing for a comprehensive analysis to enhance security protocols.

Access logs track who enters and exits a facility but do not provide continuous monitoring or visual evidence. While lighting improves visibility, it does not actively monitor or record events. Training staff is crucial for raising awareness and proper incident response, but it relies on human observation and reporting, which can be limited and inconsistent compared to the continuous visual coverage offered by cameras. Thus, for ongoing surveillance and the ability to review incidents, cameras stand out as the most effective control measure in this context.