单项选择题 An administrator recently installed a new array controller into a server. When the server is running POST the controller does not appear as present.  Which of the following could be the reason for this？（）

单项选择题 Which of the following is an environmental server maintenance task that should be performed every three months?（）

单项选择题 Whichofthefollowingchannelsairflowthroughaserverchassis？（）