Which of the following statements about the IKEv2 protocol compared to IKEv2 is incorrect?
A . IKEv2 is more secure by requiring reauthentication for IKE SA
B . IKEv2 is more efficient with reduced message exchange
C . IKEv2 has more flexible authentication support with EAR
D . IKEv2 is more reliable by requiring all messages to be acknowledged
E . IKEv2 has built in Dos (Denial of Services) protection
Answer: A