If you check the box Use Aggressive Mode in the IKE Properties dialog box, the standard:

If you check the box Use Aggressive Mode in the IKE Properties dialog box, the standard:

A.
three-packet IKE Phase 2 exchange Is replaced by a six-packet exchange

B.
three-packet IKE Phase 2 exchange is replaced by a two-packet exchange

C.
six-packet IKE Phase 1 exchange is replaced by a three-packet exchange

D.
three-packet IKE Phase 1 exchange is replaced by a six-packet exchange