多项选择题 You are at the top of the hierarchy and must configure OSPF on interface so-0/0/0 unit 100. Which two achieve this result?（）

单项选择题 You are configuring a new BGP neighbor and want to view the configuration of interface ge- 0/0/0.42.Which command do you use to achieve this result?（）

单项选择题 You want to log in to the router and make a configuration change. After logging in as the root user, what is the next command you must enter?（）