多选题Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by AH？（）Adata integrityBdata confidentialityCdata authenticationDouter IP header confidentialityEouter IP header authentication
题目
多选题
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