单项选择题
The enable secret command is used to secure access to which CLI mode？（）
A.user EXEC mode B.global configuration mode C.privileged EXEC mode D.auxiliary setup mode
单项选择题 Where does routing occur within the DoD TCP/IP reference model?（）
多项选择题 Which two states are the port states when RSTP has converged?（）
多项选择题 WhichcommandsarerequiredtoproperlyconfigurearoutertoproperlyconfigurearoutertorunOSPFandtoaddnetwork192.168.16.0/24toOSPFarea0？（）
