What should you do to reduce spanning-tree protocol BPDU traffic during extended periods ofinstability in your VLANs？（）

多项选择题Exhibit SW1#show spanning-tree vlan 200 VLAN200 Spanning tree enabled protocol iee eRoot ID Priority 32968 Address 000c.ce29.ef00 Cost 19 Port 2 （FastEthernet0 2） Hello time 10 Sec Max Age 20 sec Forward Delay 30 sec  Bridge ID Priority 32968 （priority 32768 sys-id-ext 200） Address 000c.ce2a.4180 Hello Time 2 sec Max Age 20 Sec Forward Delay 15 sec  Interface Role Sts Cost PrioNbr Type Fa0 2 Root FWD 19 128.2 P2p Fa0 3 Altn BLK 19 128.3 P2p   Based on the show spanning-tree vlan 200 output shown in the exhibit， which two statementsabout the STP process for VLAN 200 are true？（）

A.BDPUs will be sent out every two seconds
B.The time spent in the listening state will be 30 seconds
C.The time spent in the learning state will be 15 seconds
D.The maximum length of time that the BPDU information will be saved is 30 seconds
E.This switch is the root bridge for VLAN 200
F.BPDUs will be sent out every 10 seconds

单项选择题Iftherootbridgefails，configurationBPDUswillnolongerbesent.WhichSTPtimerwillhavetoexpirebeforetheotherswitchescanactivelyrestoreconnectivitywithtopologychangeprocedureofSTP？（）

A.hello timer
B.BPDU timer
C.Forward_delay timer
D.Max_age timer
E.Dead timer
F.Wait timer

多项选择题Given the above diagram and assuming that STP is enabled on all switch devices， which twostatements are true？（）

A.DSW11willbe elected the root bridge
B.DSW12 will be elected the root bridge
C.ASW13 will be elected the root bridge
D.P3/1 will be elected the nondesignated port
E.P2/2 will be elected the nondesignated port
F.P3/2 will be elected the nondesignated port

单项选择题Exhibit： Assuming that VLAN 1 and VLAN 2 traffic is enabled on the above network， what effect will thefollowing command have when entered on port 0 2 on switch SWA？（） spanning-tree vlan 1 port-priority 16

A.VLAN 1 traffic will be blocked on Switch SWB port 1/1
B.VLAN 2 traffic will be blocked on Switch SWB port 1/1
C.VLAN 2 traffic will be blocked on Switch SWA port 0/2
D.VLAN 1 and 2 traffic will be blocked on Switch SWA port 0/1
E.VLAN 1 and 2 traffic will be blocked on Switch SWA port 0/2

多项选择题Refer to the exhibit. All network links are FastEthernet. Although there is complete connectivitythroughout the network， Front Line users have been complaining that they experience slowernetwork performance when accessing the server farm than the Reception office experiences.Based on the exhibit， which two statements are true？（）

A.Disabling the Spanning Tree Protocol would improve network performance
B.Changing the bridge priority of S1 to 36864 would improve network performance
C.Changing the bridge priority of S1 to 4096 would improve network performance
D.Changing the bridge priority of S3 to 4096 would improve network performance
E.Upgrading the link between S2 and S3 to Gigabit Ethernet would improve performance
F.Changing the bridge priority of S2 to 36864 would improve network performance