单项选择题
Which of the following commands would a technician use to view the active applicationconnections on a local PC to the network?（）
A.ipconfig
B.netstat
C.nslookup
D.net use
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Which of the following protocols uses port 443 by default?（）
A.LDAP
B.SNMP
C.HTTPS
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单项选择题
A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for this problem?（）
A. Replace the computer.
B. Run chkdsk /f.
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多项选择题
Operating system files for Windows Vista and Windows XP are located in which of the following?（）(Select TWO).
A. C:\documents and settings\administrator
B. C:\windows\system
C. C:\users\system 32
D. C:\winnt
E. C:\windows
