单项选择题
A. It will recall the previous command line
B. It will move the cursor one line up
C. It will redisplay the current command line
D. It will capitalize the command line
E. None of the above
单项选择题 You just purchased a refurbished router that contains a configuration from a previous deployment. What should you do, before entering a new configuration into the router?（）
单项选择题 In the Cisco IOS, what is the definition of a global command?（）
单项选择题 After logging into a router, you type in "enable" and then enter the correct password when prompted. What is the current router prompt symbol at this point?（）