Which technique uses detectors around a high-value target for warning?

• A. Area Array uses detectors throughout a geographic area.
• B. Critical Node uses detectors around a high-value target for warning.
• C. Nearside-Farside survey techniques.
• D. Observe means watching a location visually.

Answer: (B)

The idea being tested is to protect a high-value asset by surrounding it with detectors so any approach or tampering triggers a warning. This focused, perimeter-based sensing is what the critical node approach is designed to do: place detectors around the valuable target to detect threats early and alert responders.

Area-wide detection covers a broad geographic region, which isn’t aimed at guarding a single high-value point, so it doesn’t provide the targeted early warning around the asset. Nearside-Farside survey techniques come from a different domain and aren’t about detector networks for warning. Observing by eye relies on human monitoring rather than an automated detector perimeter.