What network information do you need when you plan to implement a VLAN-based solution？（）

单项选择题During testing of network redundancy in a fully meshed enterprise campus， a problem has been reported. Both distribution multilayer switches are fully configured for redundancy； clients operate normally when the primary multilayer distribution switch is operating. All clients drop connections outside of their respective access layer group when the primary distribution switch is shut down and the secondary distribution switch is still operational. Additional information indicates that the secondary  distribution switch is able to ping major corporate and Internet locations.  Which item would be the best point of troubleshooting for this connectivity issue？ （）

A.client network configuration
B.VLAN mapping
C.inter-switch trunk configuration
D.UDLD configuration
E.first-hop redundancy protocol

单项选择题WhichCiscoIOScommandgloballyenablesport-basedauthenticationonaswitch？（）

A.aaa port-auth enable
B.radius port-control enable
C.dot1x system-auth-control
D.switchport aaa-control enable

单项选择题Whatdoestheinterfacesubcommandswitchportvoicevlan222indicate？（）

A.The port is configured for both data and voice traffic.
B.The port is fully dedicated to forwarding voice traffic.
C.The port will operate as an FXS telephony port.
D.Voice traffic will be redirected to VLAN 222.

单项选择题A remote host can be pinged from all switches except one.  Which of the following is the most likely reason for this failure？（）

A.VTP pruning has isolated the switch.
B.IP routing is disabled on the switch.
C.PoE is failing on the remote port.
D.There is a loop in the topology.

单项选择题Whatistheresultofenteringthecommandspanning-treeloopguarddefault？（）

A.The command enables both loop guard and root guard.
B.The command changes the status of loop guard from the default of disabled to enabled.
C.The command activates loop guard on point-to-multipoint links in the switched network.
D.The command will disable EtherChannel guard.