Which Cisco IOS command globally enables port-based authentication on a switch？ （）

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.

单项选择题Whatistheresultofenteringthecommandport-channelload-balancesrc-dst-iponanEtherChannellink？（）

A.Packets are distributed across the ports in the channel based on both the source and destination MAC addresses.
B.Packets are distributed across the ports in the channel based on both the source and destination IP addresses.
C.Packets are balanced across the ports in the channel based first on the source MAC address， then on the destination MAC address， then on the IP address.
D.Packets are distributed across the access ports in the channel based first on the source IP address and then the destination IP addresses.

多项选择题WhichthreeofthefollowingareorganizationalobjectivesthatshouldbeaddressedwhendevelopinganewVLANimplementationplan？（）

A.network management
B.improving QoS
C.determining budget
D.reducing costs
E.increasing competitiveness
F.improving customer support