What characteristic does Multi-Factor Authentication add to network security?

Multi-Factor Authentication (MFA) enhances network security by requiring multiple methods of verification to access a system. Instead of relying solely on a single password, MFA combines something the user knows (like a password), something the user has (such as a smartphone or hardware token), or something the user is (biometric information like a fingerprint). This layered approach significantly increases security because it makes it much harder for unauthorized individuals to gain access, even if one factor (like a password) is compromised.

The need for multiple forms of authentication ensures that even if a user's password is stolen, an attacker would still need the second factor to successfully authenticate, thus providing a stronger defense against numerous threats, including phishing and credential theft.