单项选择题
A. The power cable was installed incorrectly and needs to be flipped.
B. The floppy drive was not enabled within the motherboard’s BIOS.
C. The FDD cable was installed incorrectly and needs to be flipped.
D. A Molex power cable was used instead of a Berg cable.
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?（）
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?（）
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?（）