In IKE phasel, IKE creates an authenticated, secure channel between the two IKE peers, called
the IKE security association. The Diffie-Hellman key agreement is always performed in this phase.
What are the three authentication methods that you can use during IKE Phase 1? (Choose three,)

A.
AAA Authentication

B.
pre-shared key

C.
RSA signature

D.
RSA encrypted nonce