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Question #147【EN】What function do security groups serve related to Amazon Elastic Compute Cloud (Amazon EC2) instance security?【CN】与亚马逊弹性计算云(Amazon EC2)实例安全相关的安全组有哪些功能?
A.[EN]Act as a virtual firewall for the Amazon EC2 instance.[CN]充当Amazon EC2实例的虚拟防火墙。
B.[EN]Secure AWS user accounts with AWS Identity and Access Management (IAM) policies.[CN]使用AWS身份和访问管理(IAM)策略保护AWS用户帐户。
C.[EN]Provide DDoS protection with AWS Shield.[CN]使用AWS Shield提供DDoS防护。
D.[EN]Use Amazon CloudFront to protect the Amazon EC2 instance.[CN]使用Amazon CloudFront保护Amazon EC2实例。
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