CompTIA Security+ (SY0-501) — Question 124

Which of the following implements two-factor authentication?

Answer options

• A. A phone system requiring a PIN to make a call
• B. At ATM requiring a credit card and PIN
• C. A computer requiring username and password
• D. A datacenter mantrap requiring fingerprint and iris scan

Correct answer: B

Explanation

The correct answer is B, as it involves two different factors: something you have (the credit card) and something you know (the PIN). Option A only requires a PIN, option C relies solely on a username and password, and option D, while secure, does not involve two different types of factors as it uses biometric authentication only.