多项选择题
A. It must include a root password
B. It is roll back file number 50, and you can recover it by issuing rollback 50
C. It is created by issuing request system configuration rescue save
D. It is updated automatically when you commit
单项选择题 You have been asked to create a static route with a next hop that is not directly connected to the router.Which configuration parameter enables the static route to accomplish this scenario?（）
多项选择题 Referring to the exhibit, which two statements are true?（）
多项选择题 You are the top of hierarchy and must configure OSPF on inteface so-0/0/0 unit 100. Which two achieve this result?（）