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單項(xiàng)選擇題

A user reports that their onboard RJ-45 jack is damaged and will no longer function. Which of the following will provide this jack as an alternative to replacing the motherboard?（）

A. Install a USB serial adapter
B. Connect to a USB hub
C. Use an external modem
D. Use an Ethernet card

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單項(xiàng)選擇題

A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）

A. Cable tester
B. Power supply tester
C. Tone generator
D. Multimeter

單項(xiàng)選擇題

Which of the following tools can be used to test if a 24-pin power cable is outputting correct voltage?（）

A. Cable tester
B. Wrist strap
C. Multimeter
D. Loopback plug