Multiple choice technology architecture

Retinal scanning falls into which category of authentication ?

  1. What we know

  2. What we are

  3. What we have

  4. What we use
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B Correct answer
Explanation

Retinal scanning falls under 'what we are' (biometrics) because it uses unique physical characteristics of the human body. The three authentication factor types are: what we know (passwords, PINs), what we have (tokens, smart cards), and what we are (biometrics like fingerprints, retina scans). 'What we use' is not a standard authentication category.

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