题目：Various security measures are recommended EXCEPT ________. [A] turning off networ
Various security measures are recommended EXCEPT ________.
[A] turning off network services
[B] employing a full-inspection firewall
[C] making sure that servers and applications are patched
[D] eliminating all unneeded programs
其依据是"Turn off unnecessary network services."即关闭不必要的网络服务，而不是关闭所有的网络服务。一字之差，却相去甚远，要注意辨析。