Which three user authentication methods are supported by the Junos OS? (Choose three.)

RADIUS (Remote Authentication Dial-In User Service) is a widely supported external authentication protocol for network devices, including Junos OS.

CHAP (Challenge Handshake Authentication Protocol) is an authentication protocol typically used for point-to-point connections, not as a primary user authentication method for device login.

The local user database allows administrators to create and manage user accounts directly on the Junos device, providing a fallback or standalone authentication method.

TACACS+ (Terminal Access Controller Access-Control System Plus) is another robust external authentication protocol, similar to RADIUS, that Junos OS supports for centralized user management.

PAP (Password Authentication Protocol) is an older, less secure authentication protocol typically used for point-to-point connections, not a primary user authentication method for device login.