Certified Ethical Hacker (CEH) — Question 18

Which set of access control solutions implements two-factor authentication?

Answer options

• A. USB token and PIN
• B. Fingerprint scanner and retina scanner
• C. Password and PIN
• D. Account and password

Correct answer: A

Explanation

The correct answer is A, as a USB token and a PIN represent two different factors for authentication: something you have and something you know. The other options either use a single factor or do not meet the criteria for two-factor authentication.