Which of the following information is included in the main mode negotiation process in the first phase of IKE v1 negotiation? (Multiple choice)

Which of the following information is included in the main mode negotiation process in the first phase of IKE v1 negotiation? (Multiple choice)
A . IKE Proposal Set
B . IPSec Proposal Set
C . DH key exchange public information
D . Identity information of both parties

Answer: ACD