You are the top of the hierarchy in configuration mode. How would you save your configuration to a file on the router?（）

单项选择题What information does the help topic command provide?（）

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?（）

A.space bar for both command and variable completion
B.space bar for command completion；tab key for variable completion
C.space bar for variable completion；tab key for command completion
D.tab key for variable and command completion；space bar for command completion

单项选择题In which mode are users allowed to configure the device, including interfaces, protocols, user access, and system hardware properties?（）

A.priviledged mode
B.configuration mode
C.monitoring mode
D.operational mode

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?（）

A.UNIX shell
B.user level CLI
C.configuration mode
D.operational mode

单项选择题Which statement is true about the internal link between the Routing Engine and the Packet-Forwarding Engine?（）

A.It is only used for exception traffic.
B.It is an FE link called fxp2.
C.It is rate-limited to avoid DDOS attacks.
D.It is only used to send the forwarding-table from the Routing Engine to the Packet-Forwarding Engine.