Which option is one of the difference between FlexVPN and DMVPN?
A. flexvpn uses ikev2 and dmvpn can use ikev1 or ikev2
B. dmvpn can use ikev1 and ikev2 where flexvpn only uses ikev1
C. flexvpn can use ikev1 and ikev2 where dmvpn uses only ikev2
D. dmvp uses ikev1 and flexvpn use ikev3
