which of the following is an example of two-factor authentication

An example of two-factor authentication is using a bank card plus a PIN to withdraw money from an ATM.

What two-factor authentication means

Two-factor authentication (2FA) requires two different types of verification before access is granted. Typical factors are:

• Something you know (password or PIN)

• Something you have (card, phone, hardware token)

• Something you are (fingerprint, face, iris)

Common real-world examples

• Inserting a bank card at an ATM and entering the correct PIN.

• Logging into an online account with a password and then entering a one-time code sent via SMS or generated by an authenticator app.

• Using a password plus fingerprint or face scan to unlock an app or device.

How to spot the correct option

When you see a “which of the following” question, the correct 2FA example will:

• Combine two different factor types (for example, password + phone code, or card + PIN).

• Not just repeat the same factor twice (e.g., password + security question are both “something you know,” so that is not true 2FA).

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