If you check the box "Use Aggressive Mode", in the IKE Properties dialog box:
A.
The standard three-packet IKE Phase 1 exchange is replaced by a six-packet exchange.
B.
The standard six-packet IKE Phase 2 exchange is replaced by a three-packet exchange.
C.
The standard three-packet IKE Phase 2 exchange is replaced by a six-packet exchange.
D.
The standard six-packet IKE Phase 1 exchange is replaced by a three-packet exchange.
E.
The standard six-packet IKE Phase 1 exchange is replaced by a twelve-packet exchange.