Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by AH？（）

A.data integrity
B.data confidentiality
C.data authentication
D.outer IP header confidentiality
E.outer IP header authentication

A.security policy
B.interface
C.routing-instance
D.IP address

A.The NAT action of off is only supported for destination NAT rule-sets.
B.The NAT action of off is only supported for source NAT rule-sets.
C.The NAT action of off is useful for detailed control of NAT
D.The NAT action of off is useful for disabling NAT when a pool is exhausted.