How does FortiGate support user authentication for VPN access?

FortiGate supports user authentication for VPN access through a variety of methods, which is why the correct answer highlights the inclusion of RADIUS, LDAP, and local user accounts. This flexibility allows organizations to incorporate different authentication mechanisms based on their specific needs and security policies.

RADIUS (Remote Authentication Dial-In User Service) and LDAP (Lightweight Directory Access Protocol) are widely used protocols in enterprise environments for centralized authentication, which enhances security and simplifies user management. By integrating these protocols, companies can authenticate users against a centralized database of credentials, streamlining access control.

Additionally, local user accounts provide a straightforward option for smaller environments or for scenarios where centralized authentication is not required. This variety ensures that FortiGate can accommodate different infrastructure setups and security practices, making it a versatile choice for organizations looking to secure their VPN access.

The other options present a limited view of authentication methods. Relying solely on biometric scans or two-factor authentication would restrict the ability to utilize comprehensive authentication strategies. Furthermore, exclusively using local user accounts does not leverage the efficiency and centralized management provided by RADIUS or LDAP. By supporting multiple authentication methods, FortiGate ensures robust and adaptable VPN access security.