Which surveillance technique is defined by detectors set throughout a high value target for detection and early warning?

• A. Area Array
• B. Periodic
• C. Critical Node
• D. Continuous

Answer: (C)

The idea being tested is using detectors placed at strategic points whose monitoring yields the earliest indication of intrusion into a high-value target. By embedding sensors at critical nodes—points where access routes converge or where a breach would enable broader movement—you create a surveillance backbone that flags activity as soon as an intruder touches those key points. This approach ensures early warning because most paths to valuable assets must pass through at least one of these nodes, so alarms are triggered quickly and you can respond before damage or access expands.

Area-wide coverage disperses detectors across a larger space and can dilute focus from the most important chokepoints, while timing-focused options describe how often monitoring occurs rather than where detectors are placed. Continuous or perpetual monitoring describes uptime, not the strategic placement that yields rapid, actionable early warning.