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?（）

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