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

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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).

单项选择题

Which of the following commands would be used to display hidden files?（）

A. dir /?
B. dir /d
C. dir /a
D. dir /s

单项选择题

A technician has a user that consistently picks up viruses and malware no matter what kind ofsoftware is installed to prevent infection. Which of the following should be a cost-effective logical step in preventing future infections?（）

A. Place the user behind a high end NIPS device.
B. Migrate the user to a Virtual Machine environment.
C. Educate the user on browsing habits.
D. Install multiple antivirus programs on the machine to decrease the chances for infection.