单项选择题
Multiple users have reported not being able to print to a network printer. Which of the followingcommands will test the network connectivity status of the printer?（）
A. rsync
B. netstat
C. ping
D. ipconfig
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A. NTBACKUP log
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单项选择题
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A. Loopback Plug
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A user states that the laser printer is leaving a black line on all pages being printed. Which of thefollowing is the MOST likely cause and solution for this issue?（）
A. Faulty driver; reinstall or update driver
B. Bad fuser; place service call to printer manufacturer.
C. Excess toner on drum; perform maintenance (e.g. clean drum surface).
D. Deteriorating rollers and worn brushes; replace rollers and brushes.
