单项选择题
A.If BPDUs are received by a port configured for PortFast， they are ignored and none are sent.
B.The command will enable BPDU filtering on all ports regardless of whether they are configured for BPDU filtering at the interface level.
C.If BPDUs are received by a port configured for Portfast， the port will transition to forwarding state.
D.If BPDUs are received by a port configured for PortFast， then PortFast is disabled and the BPDUs are processed normally.
E.None of the other alternatives apply.
多项选择题 An SVI has been configured on a device. Which two statements are true about a switched virtual interface （SVI）？（）
多项选择题 The following output was displayed on a switch. Study the exhibit carefully. The administrator is verifying that a CEF FIB entry exists to destination network 192.168.150.0. Given the output generated by the "show ip cef" and "show adjacency detail" commands， which three statements are true？ （）
多项选择题 You work as a network technician at. Your boss， Mrs. ， is interested in the Spanning Tree Protocol timers. What can you tell her regarding the default STP timers？ （）