多项选择题
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
多项选择题 WhichthreesecurityconcernscanbeaddressedbyatunnelmodeIPsecVPNsecuredbyESP？（）
多项选择题 YouarecreatingadestinationNATrule-set.Whichtwoarevalidforusewiththefromclause？（）
单项选择题 WhichstatementistrueaboutaNATruleactionofoff？（）
