单项选择题
A technician needs to check which ports are open in the Windows Firewall. Which of the following willallow the technician to view these settings?（）
A. netsh firewall show logging
B. ipconfig /all
C. netsh firewall show state
D. arp -a
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A. They are using the wrong WEP key.
B. They have been infected with malware.
C. They have lost Internet connectivity.
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A user states they receive a message Boot device not found half of the time they boot their system.Which of the following is the MOST likely cause? （）
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A user reports that their system is starting to run slower, especially when opening large local files. The system has sufficient RAM for the users applications, but the hard drive seems to have higher than normal activity when opening large files. Which of the following would be the BEST tool to diagnose and troubleshoot this problem? （）
A. Task Manager
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D. Disk Defragmenter
