单项选择题 Multiple users have reported not being able to print to a network printer. Which of the followingcommands will test the network connectivity status of the printer?（）

单项选择题 A user states that their web browser was recently updated and continuously crashes. Which of the following could the technician use to gather more information about the issue?（）

单项选择题 Which of the following tools is BEST used to measure voltage and amperage from a power source?（）