单项选择题
A. Cellular service with an adapter for Bob’s laptop.
B. USB adapter with 802.11n capabilities for maximum speeds.
C. A Bluetooth card to attach to multiple networks.
D. Enable Wi-Fi so Bob can connect to any open network.
单项选择题 An uninstalled program is still attempting to load when Windows starts. Which of the following options can the technician suggest to stop this unwanted program from loading?（）
单项选择题 A user reports that their PC is making a strange noise. Which of the following is the cause of the problem?（）
单项选择题 Which of the following is the BEST tool to troubleshoot a DB-9 port?（）