Which of the following defines 'two-factor authentication'?

Two-factor authentication (2FA) is best defined as a security process that requires two forms of verification for access. This process enhances security beyond just requiring a single password by necessitating a second form of verification, which could be something the user has (e.g., a smartphone app that generates a time-sensitive code or a hardware token) or something the user is (e.g., a fingerprint or facial recognition).

The two distinct factors provide an additional layer of security because even if a password is compromised, an unauthorized user would still need the second form of verification to gain access to the account. This makes accounts significantly more resistant to unauthorized access and various cyber threats.

In contrast, simply requiring a password (as stated in another option) does not provide this additional security layer. Eliminating passwords altogether or simplifying account access does not reflect the essence of two-factor authentication, which inherently seeks to enhance, not reduce, security.