4, what are four ways to implement single sign-on (SSO)? (Choose four

In Cisco ASDM v6.4, what are four ways to implement single sign-on (SSO)? (Choose four.)

A.
Use SSO for smart tunnels.

B.
Use Kerberos SSO.

C.
Use the HTTP Form protocol.

D.
Use a dedicated SSO server.

E.
Use SSO for application plug-ins.

F.
Use auto sign-on for servers that do not require authentication credentials.