单项选择题
Which item is the correct matching relationships associated with IKE Phase？（）
A.IKE Phase 1 - P4S1 and P4S4，IKE Phase 2 - P4S2， P4S3 and P4S5
B.IKE Phase 1 - P4S2 and P4S4，IKE Phase 2 - P4S1， P4S3 and P4S5
C.IKE Phase 1 - P4S2 and P4S3，IKE Phase 2 - P4S1， P4S4 and P4S5
D.IKE Phase 1 - P4S1 and P4S2，IKE Phase 2 - P4S3， P4S4 and P4S5
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Forthefollowingattempts，whichoneistoensurethatnooneemployeebecomesapervasivesecuritythreat，thatdatacanberecoveredfrombackups，andthatinformationsystemchangesdonotcompromiseasystem’ssecurity？（）
A.Strategic security planning
B.Disaster recovery
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WhichoneofthefollowingcommandscanbeusedtoenableAAAauthenticationtodetermineifausercanaccesstheprivilegecommandlevel？（）
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B.Proxy firewall
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