单项选择题
A.router’s version and serial number to help open a case with JTAC
B.software documentation describing features and configuration tasks within JUNOS
C.a brief description of commands and their default values
D.a verification of the current configuration on the router
单项选择题 The auto-complete feature in the JUNOS CLI is triggered by which method?（）
单项选择题 In which mode are users allowed to configure the device, including interfaces, protocols, user access, and system hardware properties?（）
单项选择题 When a non-root user connects to a JUNOS platform and enters a username and password, the user is immediately placed at which level?（）