单项选择题
A. Upgrade the firmware on all routers and switches
B. Reboot the entire network one device at a time
C. Conduct a network traffic analysis
D. Rerun the baseline to ensure the results were correct
单项选择题 Which of the following uses a ring topology?（）
单项选择题 A user is unable to access the company website on a laptop. A network technician verifies that theuser can access other Internet pages. According to network troubleshooting methodology, which of the following steps should be taken NEXT?（）
单项选择题 Which of the following would provide a technician with a performance reference point to refer backto after hardware repair?（）