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  • Which device can not be used for authentication?
Multiple choice

Which device can not be used for authentication?

  1. Voice recognition system

  2. Fingerprint sensor

  3. Retina scanner

  4. Flatbed scanner

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A flatbed scanner is an input device used to digitize documents or images. It is not used for biometric authentication, unlike voice, fingerprint, or retina scanners.

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