Which option describes the purpose of Diffie-Hellman?
A.
used between the initiator and the responder to establish a basic security policy
B.
used to verify the identity of the peer
C.
used for asymmetric public key encryption
D.
used to establish a symmetric shared key via a public key exchange process
Explanation:
A and B are vague answers.
C can be true but impractical and probably never used for data encryption (very processor intensive)
D is correct, it is used to safely exchange a shared key which BOTH end of the vpn connection will use to encrypt data (both ~ symmetric)