Question

A user might enter a password and then be prompted to enter a security code that's sent to his or her mobile device.

Which of the following is this an example of?

answer

Strong password


Multi-factor authentication


Single sign-on


Privilege escalation

Answer 1

Multi-factor authentication

Explanation: The user provides two different factors — something they know (password) and something they have (a code sent to their mobile device) — which is the definition of multi-factor (two-factor) authentication.