单项选择题
Which user authenticaton method is supported by the Junos OS as the last resort alternative?（）
A. TACACS+ B. RADIUS C. local user database D. enable password
单项选择题 Using the command user@router# load override lastest.conf where in the file system will the lastest.conf be located?（）
多项选择题 Which three steps are parts of the root password recovery process?（）
单项选择题 What are the usable host on the 96.6.128.0/19 network?（）
