工程师小王在检查公司云计算管理平台的网络安全时，需检查虚拟网络边界的（ ）策略，查看其是否对进出网络的信息内容进行过滤，实现对应用层HTTP、FTP、TELNET、SMTP、POP3等的控制。
- A.访问控制
- B.属性安全控制
- C.目录级安全控制
- D.网络锁定控制
正确答案及解析
正确答案
解析
本题知识点：信息安全访问控制技术：访问控制按照事先确定的规则决定主体对客体的访问是否合法。当一主体试图非法使用一个未经授权的资源时，访问控制将拒绝这一企图，并将这一事件报告给审计跟踪系统，审计跟踪系统将给出报警并记录日志档案。
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