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6. ISDN stands for:
A. internal select data nulls
B. integrated services digital network
C. interval set down next
D. interior sector direct none
E. inferior sector data net
7. ISDN uses _____ technology.
A. only digital
B. digital and analog
C. only analog
D. neither digital nor analog
E. mostly digital
8. Which is LEAST likely to interfere with upgrading to a newer DOS version?
A. ROM BIOS
B. Video controller
C. Compressed drives
D. Existing backup files
E. None of the above
9. A laser printer generates a totally black page, what is the cause?
A. malfunctioning imaging laser
B. low level in the toner cartridge
C. no power to transfer corona
D. no power to the primary corona
E. None of the above
10. You must service the laser printer in your office. Which part of the printer shoud you avoid touching because it is hot?
A. fuser
B. printer head
C. primary corona
D. high-voltage power supply
E. None of the above
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