Which type of physical security control scan a person's external features through a digital video camera before granting access to a restricted area?

Question

Options

• AIris scan
• BRetinal scan
• CFacial recognition scan
• DSignature kinetics scan

• A
  5% (1)
• B
  11% (2)
• C
  79% (15)
• D
  5% (1)

Explanation

Facial recognition scan uses a digital video camera to capture and analyze a person's external facial features - bone structure, distances between eyes, nose shape - making it the only option that relies on a standard camera viewing the face's surface.

Why the distractors are wrong:

• A (Iris scan): Captures the unique patterns of the colored ring around the pupil using specialized infrared cameras, not a standard digital video camera, and targets one internal eye structure.
• B (Retinal scan): Goes even deeper, scanning the blood vessel patterns at the back of the eye using low-intensity infrared light - highly invasive and nothing like a camera capturing external features.
• D (Signature kinetics scan): Analyzes the behavioral dynamics of how someone writes (speed, pressure, pen angle), not physical appearance at all.

Memory tip: Think "facial = face = what a camera sees." A regular security camera can feed into facial recognition, but no camera can do a retinal or iris scan on its own - those require specialized close-range sensors. If the question mentions a "digital video camera" and "external features," the answer is always facial recognition.

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