Refer to the exhibit. Based on the output of the show spanning-tree command， 
which statement is true？ （）

单项选择题Refer to the exhibit. On the basis of the output of the show spanning-tree inconsistentports command，  which statement about interfaces FastEthernet 0 1 and FastEthernet 0 2 is true？（）

A.They have been configured with the spanning-tree bpdufilter disable command.
B.They have been configured with the spanning-tree bpdufilter enable command.
C.They have been configured with the spanning-tree bpduguard disable command.
D.They have been configured with the spanning-tree bpduguard enable command.
E.They have been configured with the spanning-tree guard loop command.
F.They have been configured with the spanning-tree guard root command.

单项选择题Refer to the exhibit. STP has been implemented in the network. Switch SW_A is the root switch for the default VLAN. To reduce the broadcast domain， the network administrator decides to split users on the network into VLAN 2 and VLAN 10. The administrator issues the command spanning-tree vlan 2 root primary on switch SW_A.  What will happen as a result of this change？（）

A.All ports of the root switch SW_A will remain in forwarding mode throughout the reconvergence of the spanning tree domain.
B.Switch SW_A will change its spanning tree priority to become root for VLAN 2 only.
C.Switch SW_A will remain root for the default VLAN and will become root for VLAN 2.
D.No other switch in the network will be able to become root as long as switch SW_A is up and running.

单项选择题Refer to the exhibit. The command switchport mode access is issued on interface FastEthernet0 13 on switch CAT1.  What will be the result？（）

A.The command will be rejected by the switch.
B.Interfaces FastEthernet0/13 and FastEthernet0/14 will no longer be bundled.
C.Dynamic Trunking Protocol will be turned off on interfaces FastEthernet0/13 and FastEthernet0/14.
D.Interfaces FastEthernet0/13 and FastEthernet0/14 will only allow traffic from the native VLAN.
E.Interfaces FastEthernet0/13 and FastEthernet0/14 will continue to pass traffic for VLANs 88，100，360.

单项选择题Refer to the exhibit.  What will happen when one more user is connected to interface FastEthernet 5 1？ （）

A.All secure addresses will age out and be removed from the secure address list. This will cause the security violation counter to increment.
B.The first address learned on the port will be removed from the secure address list and be replaced with the new address.
C.The interface will be placed into the error-disabled state immediately， and an SNMP trap notification will be sent.
D.The packets with the new source addresses will be dropped until a sufficient number of secure MAC addresses are removed from the secure address list.

单项选择题Refer to the exhibit. LACP has been configured on Switch1 as shown.  Which is the correct command set to configure LACP on Switch2？（）

A.Switch2# configure terminal Switch2（config）# interface range gigabitethernet3/1 -2 Switch2（config-if）# channel-group 5 mode auto
B.Switch2# configure terminal Switch2（config）# interface range gigabitethernet3/1 -2 Switch2（config-if）# channel-group 5 mode passive
C.Switch2# configure terminal Switch2（config）# interface range gigabitethernet3/1 -2 Switch2（config-if）# channel-group 5 mode desirable
D.Switch2# configure terminal Switch2（config）# interface range gigabitethernet3/1 -2 Switch2（config-if）# channel-group 5 mode on