单项选择题
A user reports that they are unable to print to a remote printer. Which of the following should the technician check FIRST？（）
A.Printer driver
B.Protocol stack
C.Network connectivity
D.Correct patch application
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A technician（技术） has a current baseline（基准线） and is told to install additional（添加） memory and a faster NIC card. At which point in time should the next baseline be run？（）
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