What is the purpose of "two-factor authentication (2FA)" in cybersecurity?
2023
What is the purpose of "two-factor authentication (2FA)" in cybersecurity?
- A.
To encrypt sensitive data
- B.
To filter network traffic
- C.
To lure attackers and gather information about their techniques
- D.
To add an extra layer of security by requiring two forms of authentication
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Correct answer: D
Answer: To add an extra layer of security by requiring two forms of authentication.
Explanation: Two-factor authentication (2FA) enhances account security by requiring two different types of authentication factors. Requiring two factors makes it harder for attackers to gain access even if one factor (such as a password) is compromised.
Something you know — e.g., password or PIN.
Something you have — e.g., a one-time code, authenticator app, or hardware token.
Something you are — e.g., biometric verification like fingerprint or facial recognition.
By combining two factors from different categories, 2FA significantly reduces the likelihood of unauthorized access compared with single-factor authentication.