单项选择题

A user wants to be able to receive help from a coworker that is located outside the company’s local office. Which of the following MUST be enabled to allow the user to watch and interact with the coworker simultaneously?（）

A. Remote Desktop
B. Telnet
C. Computer Management
D. Remote Assistance

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单项选择题

A user replaces a laptop’s wireless PCMCIA card with a different vendor’s card. All of the new card configuration steps have been followed. The OS sees all known wireless networks but cannot connect to the user’s network.
Which of the following is the MOST likely reason for this behavior?（）

A. DMZ is enabled.
B. MAC filtering is enabled.
C. WEP is being used.
D. SSID broadcast is disabled.

单项选择题

A user reports that their onboard RJ-45 jack is damaged and will no longer function. Which of the following will provide this jack as an alternative to replacing the motherboard?（）

A. Install a USB serial adapter
B. Connect to a USB hub
C. Use an external modem
D. Use an Ethernet card

单项选择题

A technician does not have power to a PC. Which of the following tools should the technician use to check for electricity?（）

A. Cable tester
B. Power supply tester
C. Tone generator
D. Multimeter