多项选择题
Which two statements are true of login classes?（）
A. Users can be members of multiple login classes. B. Login classes define authorization parameters for a user. C. There are five system-defined login classes. D. Login class permission flags can be overridden for certain commands.
多项选择题 Which information would you find using the CLI help function?（）
单项选择题 Which mode is used to allow only a single person to edit a configuration?（）
多项选择题 Referring to the exhibit, what are two differences between the active and candidate configurations?（）
