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單項選擇題

Which of the following default ports must be opened to allow a technician to telnet into a machine?（）

A.21
B.23
C.24
D.25

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單項選擇題

After opening up the lid of a laptop that is powered on, nothing is displayed on the LCD. Opening and closing the lid multiple times usually causes the display to regain the signal.
Which of the following components should the technician check FIRST?（）

A. Motherboard
B. Video card
C. Cutoff switch
D. AC adapter

單項選擇題

Which of the following is the number of SCSI devices that can be added to a single narrow SCSI bus?（）

A.6
B.7
C.8
D.9

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