During the establishment of an Easy VPN tunnel, when is XAUTH performed?
A.
at the end of IKEv1 Phase 2
B.
at the beginning of IKEv1 Phase 1
C.
at the end of Phase 1 and before Phase 2 starts in IKEv1 and IKEv2
D.
at the end of Phase 1 and before Phase 2 starts in IKEv1