简答题

Refer to the output shown on switch SW1 below： 
Warning： Spantree port fast start should only be enabled on ports connected to a single host.Connecting hubs， concentrators， switches， bridges， etc. to a fast start port can cause temporaryspanning tree loops. Use with caution.
Spantree ports 4/1-24 fast start enabled. 
What command could you enter to reproduce this output？

问答题Refer to the output shown on switch SW1 below：  VLAN 1 bridge priority set to 8192. VLAN 1 bridge max aging time set to 20.VLAN 1 bridge hello time set to 2. VLAN 1 bridge forward delay set to 15. Switch is now the root switch for active VLAN 1.  What command would you enter to reproduce this output？

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

单项选择题The switched LAN is displayed below： In this network， STP has been implemented. Switch SW1 is the root switch for the default VLAN.To reduce the broadcast domain， the network administrator decides to split users on the networkinto VLAN 2 and VLAN 10. The administrator issues the command spanning-tree vlan 2 rootprimary on switch SW1. What will happen as a result of this change？（）

A.Switch SW1 will change its spanning tree priority to become root for VLAN 2 only
B.All ports of the root switch SW1 will remain in forwarding mode throughout the reconvergenceof the spanning tree domain
C.No other switch in the network will be able to become root as long as switch SW1 is up andrunning
D.Switch SW1 will remain root for the default VLAN and will become root for VLAN 2
E.None of the other alternatives apply

单项选择题The switched LAN is shown below： Study the exhibit above carefully. Switch SW5 is configured as the root switch for VLAN 10 but notfor VLAN 20. If the STP configuration is correct， what will be true about Switch SW5？（）

A.All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in standbymode
B.All ports will be in forwarding mode
C.All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in blockingmode
D.All ports in VLAN 10 will be in forwarding mode
E.None of the other alternatives apply