You are at the top of the hierarchy and must configure OSPF on interface so-0/0/0 unit 100. Which two achieve this result?（）

单项选择题You are configuring a new BGP neighbor and want to view the configuration of interface ge- 0 0 0.42.Which command do you use to achieve this result?（）

A. [edit protocols bgp group external]   user@router# set interfaces ge-0/0/0.42
B. [edit protocols bgp group external]   user@router# edit show interfaces ge-0/0/0.42
C. [edit protocols bgp group external]   user@router# top show interfaces ge-0/0/0.42
D. [edit protocols bgp group external]   user@router# show interfaces ge-0/0/0.42

单项选择题You want to log in to the router and make a configuration change. After logging in as the root user, what is the next command you must enter?（）

A. enable
B. configure
C. edit
D. cli

单项选择题Which command do you use to identify the meaning of a syslog message?（）

A. help log messages
B. man log messages
C. man syslog
D. help syslog

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

A. A brief description of commands and their default values
B. The serial number and version number of the device used to open a support case with JTAC
C. A list of all the active hardware alarms on the device
D. A display of the current configuration while in operational mode

单项选择题You need to control SSH, HTTP, and Telnet access to an MX240 router through any interface.You have decided to use a firewall filter. How should you apply the firewall filter?（）

A. as an outbound filter on interface fxp0
B. as an outbound filter on interface lo0
C. as an inbound filter on interface fxp0
D. as an inbound filter on interface lo0