Which of the following authentication methods can be used for SSL VPN authentication? (Choose three.)

FortiGate SSL VPN supports remote password authentication by integrating with external authentication servers such as RADIUS and LDAP, allowing users to authenticate against existing enterprise directories.

Two-Factor Authentication (2FA) is a supported and recommended method for SSL VPN to enhance security, often implemented using FortiToken or other time-based one-time password (TOTP) solutions.

FortiGate SSL VPN can authenticate users against its internal local user database, where user accounts and passwords are created and stored directly on the FortiGate device itself.

FSSO (Fortinet Single Sign-On) is primarily a mechanism for transparently identifying users for firewall policies based on their Windows login, not a direct authentication method for the SSL VPN login portal itself.

RSSO (Remote Single Sign-On) is similar to FSSO, used for obtaining user identity information from external systems for policy enforcement, and is not a direct authentication method for SSL VPN logins.