单项选择题
Which operating system do Juniper Networks MX Series routers use?（）
A. IOS B. MX-OS C. UNIX D. Junos OS
单项选择题 Which command will display the contents of the forwarding table?（）
单项选择题 Which command do you use to navigate to [edit interfaces]?（）
单项选择题 Which CLI mode allows you to make configuration changes?（）
