How does Cisco ISE implement 'Multi-Factor Authentication' (MFA)?

Multi-Factor Authentication (MFA) in Cisco Identity Services Engine (ISE) enhances security by requiring users to present two or more verification factors to gain access to systems or applications. This approach significantly reduces the risk of unauthorized access, as it doesn't solely rely on a single factor, such as a password, which can be compromised. By integrating various factors—such as something the user knows (a password), something the user possesses (a smart card or mobile device), or something inherent to the user (biometric identification)—MFA creates a layered defense.

The implementation of MFA in Cisco ISE can be realized through various authentication methods, such as combining a password with a one-time passcode sent via SMS or an authentication app. This ensures that even if one factor is compromised, the additional verification steps are still in place to protect access.

In contrast, other options focus on single-factor authentication or lack the comprehensive security measures that MFA offers. Therefore, the requirement of two or more verification factors is what distinguishes MFA in Cisco ISE, making it the correct approach for enhancing security in user authentication.