Which one of the following is an example of two-factor authentication?

Step 1: Define the Problem

Identify the key components of the question that need to be addressed: Determine which option represents two-factor authentication.

Step 2: Break Down the Problem

Divide the problem into smaller, manageable parts:

• Understand what two-factor authentication (2FA) means.
• Identify examples of 2FA.

Step 3: Apply Relevant Concepts

Two-factor authentication involves using two different types of evidence to verify a user's identity. This typically includes:

• Something you know (e.g., password or PIN)
• Something you have (e.g., a smartphone or security token)
• Something you are (e.g., fingerprint or facial recognition)

Step 4: Analysis, Verify and Summarize

Analyze each option provided (though not listed here) to see which one involves two distinct factors from the categories above.

Final Answer

An example of two-factor authentication is using a password (something you know) and a code sent to your smartphone (something you have).