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?（）
多项选择题 Which two commands will successfully create ping traffic?（）
单项选择题 How do you ping from configuration mode?（）
