Which of the following is NOT a type of security operation?

• A. Area security
• B. Screen
• C. Guard
• D. Patrol

Answer: (D)

The main idea is how security is organized to protect people and assets. Area security, screen, and guard are types of security operations because each is a defined method for protecting a location or route: area security concentrates protection on a designated area to prevent unauthorized access and movement; screen provides early warning and observation along a path or approach to keep the main force informed and free to operate; and guard establishes a fixed security presence around a location to deter and detect threats.

Patrol differs because its primary focus is movement, reconnaissance, and gathering information rather than maintaining a continuous protective posture around a location. A patrol travels through terrain to detect threats, locate obstacles, or collect intelligence, which is more about mobility and information than about hardening a position. While patrols can support security by providing alerts or disrupting threats, they are not categorized as a security operation type in the same way as area security, screen, and guard.