Which term is used to describe a surveillance technique category?

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

Answer: (B)

Focusing surveillance on the most influential points in a system is captured by a category that targets the critical nodes. This term names approaches that concentrate monitoring on elements whose observation yields the most significant insight or impact for understanding the network or detecting risk. The reason it’s the best fit is that it describes what is being surveilled—the essential points—rather than when surveillance occurs or how sensors are arranged. Periodic and continuous refer to timing (how often surveillance happens), while area array describes the spatial deployment of sensors. So, the concept of surveillance focused on high-value or essential points in the network is described by the term critical node. For context, think of monitoring central servers, backbone routers, or other nodes whose activity reveals the most about overall system health or potential threats.