Which two of the following statements about GETVPN are correct? (Choose two)
A . GETVPN Key Servers uses the stateful HSRP protocol to provide redundancy
B . A GETVPN Key Server can use either IKEv1 or IKEv2 protocol to authenticate Group Members
C, GETVPN uses transport mode IPsec encapsulation
C . GETVPN does not provide a tunnel overlay
D . GETVPN requires multicast enabled Group Members for group SA rekey
Answer: DE