单项选择题
A. Remotely connect to the user's laptop and review the network configuration settings
B. Ping the web server from inside the network to ensure it is still up and running.
C. Check to make sure the company's website is accessible from the Internet.
D. Ensure the Ethernet cable is securely plugged into the user's laptop
单项选择题 Which of the following would provide a technician with a performance reference point to refer backto after hardware repair?（）
单项选择题 The network technician is troubleshooting a network issue by implementing a new security device.After installing and configuring the device, which of the following steps should the technician takeNEXT?（）
单项选择题 When ordering switches for a new building, which of the following is the BEST way for the technician to determine the number of switches to put in each network closet?（）