单项选择题 Which of the following groups should staff accounts be placed in, if the staff is required to perform most but not all maintenance tasks on a Windows PC?（）

单项选择题 Bob, a technician, wants to run antivirus scans on every machine on a daily basis. To minimize the impact to all system resources, which of the following is the BEST time to schedule the scans to run?（）

单项选择题 While using the ping command to try and reach a local server, a technician receives a response of “Destination host unreachable”. After confirming that the PC is physically connected to the network, which of the following commands should the technician use to get more detailed information?（）