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  3. Which of the following best describes the difference between a virtual firewall that works in bridge mode versus one that is emb

Which of the following best describes the difference between a virtual firewall that works in bridge mode versus one that is emb

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问题 Which of the following best describes the difference between a virtual firewall that works in bridge mode versus one that is embedded into a hypervisor?
选项 A、Bridge-mode virtual firewall allows the firewall to monitor individual traffic links, and hypervisor integration allows the firewall to monitor all activities taking place within a host system.
B、Bridge-mode virtual firewall allows the firewall to monitor individual network links, and hypervisor integration allows the firewall to monitor all activities taking place within a guest system.
C、Bridge-mode virtual firewall allows the firewall to monitor individual traffic links, and hypervisor integration allows the firewall to monitor all activities taking place within a guest system.
D、Bridge-mode virtual firewall allows the firewall to monitor individual guest systems, and hypervisor integration allows the firewall to monitor all activities taking place within a network system.
答案A
解析 A正确。虚拟防火墙可以是桥接模式的产品，它会监控两个虚拟机之间的个人流量连接，或者该产品也可以被整合到虚拟化环境的管理程序(hypervisor)中。管理程序是一种执行虚拟机管理和监督客机系统(guest system)软件执行的软件组件。如果管理程序中嵌入了防火墙，那么它就可以“看到”和监听到发生在主机系统(host system)内的所有行为。
B不正确。因为桥接模式的虚拟防火墙允许防火墙监听两个主机间的个人流量连接，而不是两个网络连接间的个人流量连接。管理程序整合允许防火墙监听发生在主机系统内的所有行为，而不是客机系统内的所有行为。
C不正确。因为桥接模式的虚拟防火墙允许防火墙监听个人流量连接，而管理程序整合允许防火墙监听发生在主机系统内的所有行为，而不是客机系统内的所有行为。管理程序是一种执行虚拟机管理和监督客机系统软件执行的软件组件。如果管理程序中嵌入了防火墙，那么它就可以“看到”和监听到发生在主机系统内的所有行为。
D不正确。因为桥接模式的虚拟防火墙允许防火墙监听两个主机系统间的个人流量连接，而管理程序整合允许防火墙监听发生在主机系统内的所有行为，而不是网络系统内的所有行为。
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