单项选择题
A. show system boot-messages
B. show chassis messages
C. show file system boot-messages
D. show boot-log messages
单项选择题 Which command displays the amount of space available on the storage media?（）
单项选择题 Which operational command would you use to quickly verify the state of all interfaces?（）
单项选择题 Your network administrator has asked you to view the real-time interface usage on ge-0/0/0. Which command would be used?（）