2. 计算机
  3. The following scenario is to be used for questions 30, 31, and 32. Greg is the security facility officer of a financial institut

The following scenario is to be used for questions 30, 31, and 32. Greg is the security facility officer of a financial institut

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问题 The following scenario is to be used for questions 30, 31, and 32.
Greg is the security facility officer of a financial institution. His boss has told him that visitors need a secondary screening before they are allowed into sensitive areas within the building. Greg has also been told by the network administrators that after the new HVAC system was installed throughout the facility, they have noticed that power voltage to the systems in the data center sags.
Which of the following is a control that Greg’s team could implement to address the network administrators’ issue?
选项 A、Secondary feeder line
B、Insulated grounded wiring
C、Line conditioner
D、Generator
答案C
解析 C正确。正因为这些事情的发生很普遍，所以需要有对应的机制来检测不期望的电力波动，进而保护数据处理环境的完整性。稳压器和线路调节器可以用来确保干净平稳的电流供应。主要电源流经稳压器和线路调节器。稳压器和线路调节器有能力在高压电时吸收多余的电流，并在电压不足时补充电流。
A不正确。因为来自变压器的二级反馈线路并不能解决场景中描述的问题。所以，会有另一根线路用于冗余备份和失效转移。
B不正确。因为绝缘接地线并没有解决场景中描述的问题。该场景中的问题与电涌有关，这意味着电源的电压是不稳定的，并且具有潜在的破坏性。将电线接地可以确保超出的电流转移到地面，而不是人或设备的某个部分。接地线也没有解决电压和电流波动问题。
D不正确。因为发电机是为了防止电力中断而实施的。发电机对电压的改变没有任何作用。
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