单项选择题 Which of the following should you enable to prevent a switch from forwarding packets with source  addresses that are outside an administratively defined group？ （）

单项选择题 Refer to the exhibit. The switchport output in Figure 1 displays the default settings of interface  FastEthernet 0/13 on switch SW1. Figure 2 displays the desired interface settings.  Which command sequence would configure interface FastEthernet 0/13 as displayed in Figure 2？ （）

单项选择题 You need make configuration changes to an existing layer 3 switch in the Company network. On a  multilayer Catalyst switch，  which interface command is used to convert a Layer 3 interface to a  Layer 2 interface？（）