ISAKMP phase 1 SA is part of a two-phase negotiation, using either the Main mode or Aggressive mode option. Which two of these identify the number of messages exchanged between the two peers in each of the two modes? (choose two.)

A.
Main mode (6 messages)

B.
Main mode (5 messages)

C.
Main mode (4 messages)

D.
Aggressive mode (4 messages)

E.
Aggressive mode (3 messages)

F.
Aggressive mode (2 messages)