A.DesignacustomIPSecpolicytoimplementEncapsulatingSecurityPayload（ESP）forallIPtrafficDesigntheIPSecpolicytousecertificate-basedauthenticationbetweenthetwodepartments’computers
B.DesignacustomerIPSecpolicytoimplementAuthenticationHeader（AH）forallIPtraffic.DesingtheIPSecpolicytousepresharedkeyauthenticationbetweenthetwodepartments’computers
C.DesignacustomerIPSecpolicytoimplementEncapsulatingPayload（ESP）forallIPtraffic.DesingtheIPSecpolicytousepresharedkeyauthenticationbetweenthetwodepartments’computers
D.DesignacustomerIPSecpolicytoimplementAuthenticationHeader（AH）forallIPtraffic.DesingtheIPSecpolicytousecertificate-basedauthenticationbetweenthetwodepartments’computers
参考答案：A
