多项选择题
Which three functions are available under the "Maintain" tab of J-Web?（）
A. download and delete log files B. view real-time statistics of interfaces C. reboot the system D. view and add licenses E. edit security settings
单项选择题 Which J-Web tab do you use to add licenses to the device?（）
单项选择题 How do you write the current candidate configuration to the permanent storage media?（）
单项选择题 What does the command show | compare rollback 1 display?（）
