单项选择题 You have just issued the command user@router# save current.conf.Assuming the default settings, where in the file system is current.conf saved?（）

单项选择题 You configured an interface with an IP address and committed the change. You then committed a change that added an exception in a firewall filter to allow this network through the filter. You realize that this work was done on the wrong router. How do you undo all these changes?（）

多项选择题 Which two statements are true when using the configure exclusive CLI command?（）