单项选择题 A technician has resolved a paper jam. After the jam is cleared, the display continues to indicate that the printer is jammed. Which of the following should be performed NEXT?（）

单项选择题 A workstation no longer has network connectivity. Upon visual inspection, all connectors andsettings seem to be properly configured. Which of the following tools should the technician use to troubleshoot this issue? （）

多项选择题 Which of the following will allow Karen, a technician, to determine if the correct voltages are reaching the computer components? (Select TWO).（）