如下图所示,两台Catelyst 3548交换机通过千兆以太网端口连接,Catelyst 3548 A使用IEEE 802.1 Q协议,两台交换机之间需要传输ID号为10、14、24,VLAN名为libl0、libl4和lib24的3个VLAN,禁止传送I

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问题 如下图所示,两台Catelyst 3548交换机通过千兆以太网端口连接,Catelyst 3548 A使用IEEE 802.1 Q协议,两台交换机之间需要传输ID号为10、14、24,VLAN名为libl0、libl4和lib24的3个VLAN,禁止传送ID号为100—1000的VLAN信息,下列交换机B的VLAN配置,正确的是(    )。

选项 A、 Switch一3548#vlan data
  Switch一3548(vlan)#vlan 10 liblO
  Switch一3548(vlan)#vlan 14 libl4
  Switch一3548(vlan)#vlan 24 lib24
  Switch一3548(vlan)#exit
  Switch—-3548#configure terminal
  Switch一3548(config)#interface gO/8
  Switch一3548(config—if)#switchpoa mode trunk
  Switch一3548(config—if)#switchpoa trunk encapsulation isl
  Switch一3548(config—if)#switchpo~trunk allowed vlan 10,14,24
  Switch一3548(config—if)#switchpoa trunk allowed vlan except 100—1000
  Switch一3548(config—if)#exit
B、  Switch一3548#vlan data
  Switch一3548(vlan)#vlan 10 name libl0
  Switch一3548(vlan)#vlan 14 name libl4
  Switch一3548(vlan)#vlan 24 name lib24
  Switch一3548(vlan)#exit
  Switch—-3548#configure terminal
  Switch一3548(config)#interface g0/8
  Switch一3548(config—if)#switchport mode trunk
  Switch一3548(config—if)#switchpo~trunk encapsulation dotl q
  Switch一3548(config—if)#switchport trunk allowed vlan 10,14,24
  Switch一3548(config—if)#switchpoa trunk allowed vlan except 100—1000
  Switch一3548(config—if)#exit
C、 Switch一3548#vlan data
  Switch一3548(vlan)#vlan 10 name libl0
  Switch一3548(vlan)#vlan 14 name libl4
  Switch一3548(vlan)#vlan 24 name lib24
  Switch一3548(vlan)#exit
  Switch-3548#configure terminal
  Switch一3548(config)#interface g0/8
  Switch一3548(config—if)#switchport mode trunk
  Switch一3548(config—if)#switchpoa trunk encapsulation isl
  Switch一3548(config—if)#switchpoa trunk allowed vlan 10,14,24
  Switch一3548(config—if)#switchpoa trunk allowed vlan except 100—1000
  Switch一3548(config—if)#exit
D、    Switch一3548#vlan data
    Switch一3548(vlan)#vlan 10 name libl0
    Switch一3548(vlan)#vlan 14 name libl4
    Switch一3548(vlan)#vlan 24 name lib24
    Switch一3548(vlan)#exit
    Switch—3548#configure terminal
    Switch一3548(config)#interface go/8
    Switch一3548(config—if)#switchport mode trunk
    Switch一3548(config—if)#switchpo~trunk encapsulation dotl q
    Switch一3548(config—if)#switchport trunk access vlan 10 14 24
    Switch一3548(config—if)#switchport trunk allowed vlan clear 100—1000
    Switch一3548(config—if)#exit

答案B

解析 本题考查的是交换机Catelyst 3500系列VLAN的配置。交换机VLAN配置的主要任务是:配置VTP,建立和删除VLAN,为交换机端口分配VLAN和在交换机端口上配置VLAN Trunk。建立VLAN命令格式:vlanname,本题使用的是IEEE 802.1 Q协议,故排除A、C选项;设置不允许中继的VLAN命令格式:switch一3528一TEST(config—if)#switchport tmnk allowed vlan expect(不允许访问的ID),排除D选项。故选择B选项。
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