在网络和信息安全产品中，（ ）独立地对网络行为和主机操作提供全面与忠实的记录，方便用户分析审查事故原因。
- A.防火墙
- B.防毒软件
- C.扫描器
- D.安全审计系统
正确答案及解析
正确答案
解析
防火墙：防火墙通常被比喻为网络安全的大门，用来鉴别什么样的数据包可以进出企业内部网。
防毒软件：是最为人熟悉的安全工具，可以检测、清除各种文件型病毒、宏病毒和邮件病毒等。
扫描器：扫描器可以说是入侵检测的一种，主要用来发现网络服务、网络设备和主机的漏涧，通过定期的检测与比较，发现入侵或违规行为留下的痕迹。
安全审计系统：通过独立的、对网络行为和主机操作提供全面与忠实的记录，方便用户分析与审查事故原因，很像飞机上的黑匣子。
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