单项选择题

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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单项选择题

A customer reports to Karen, a technician, that he is experiencing problems with the display after his computer is fully booted but reports seeing the BIOS splash screen during boot. Which of the following would MOST likely be the cause?（）

A. The video cable is incorrectly attached.
B. A corrupted or incorrect video driver is installed.
C. An incorrect video card is installed in the computer.
D. The video card is defective and needs to be replaced.

单项选择题

Which of the following command line utilities can Karen, a technician, use to check for open ports?（）

A.nbtstat
B.ipconfig
C.nslookup
D.netstat

单项选择题

An alternative to plain old telephone service (POTS) would be:（）

A. X.25.
B. Asynchronous transfer mode (ATM).
C. VoIP.
D. Public Switched Telephone Network (PSTN).