单项选择题

下列一台Catalyst 4000显示交换表的命令及对应的显示信息均正确的是( )。

A.Switch-4000#show cam dynamic 10500-50-ba-bc-43-d9GigabitEthemet2/1[ALL] 10508-00-20-b6-8b-78GigabitEthernet2/4[ALL] 12400-00-e8-01-06-f1 Gigabit:Ethernet2/4[ALL]
B.Switch-4000#show mac-address-table 10500-50-ba-bc-43-d9 2/[ALL] 10508-00-20-b6-8b-78 2/4 [AL] 12400-00-e8-01-06-f1 2/2 [ALL]
C.Switch-400CI#show cam dynamic 10500-50-ba-bc-43.d9 2/1[ALL] 10508-00-20-b6-8b-78 2/4[ALL] 12400-00-e8-01-06-f1 2/2 [ALL]
D.Switch-4000#show cam dynamic 0050.babc.43d9 Dynamic 105 2/1 [ALL] 0800.20b6.8b78 Dynamic 105 2/4 [ALL] 0000.e801.06f1 Dynamic 124 2/2 [ALL]
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单项选择题

在Cisco路由器的g0/1端口上禁止源地址为某些特定地址段的数据包进/出路由器,下列access-list的正确配置是( )。

A.Router(config)#access-list 70 deny 10.0.0.0 255.0.0.0 Router(config)#access-list 70 deny 192.168.0.0 255.255.0.0 Router(config)#access-list 70 deny 127.0.0.0 255.0.0.0 Router(config)#access-list 70 deny 172.16.0.0 255.240.0.0 Router(config)#access-list 70 permit any Router(config)#interface g0/1 Router(config-if)#ip access-group 70 in Router(config-if)#ip access-group 70 out Router(config-if)#exit Router(config)#
B.Router(config)#access-list 99 deny 10.0.0.0 0.255.255.255 Router(config)#access-list 99 deny 192.168.0.0 0.0.255.255 Router(config)#access-list 99 deny 127.0.0.0 0.255.255.255 Router(config)#access-list 99 deny 172.16.0.0 0.15.255.255 Router(config)#access-list 99 permit any Router(config)#interface g0/1 Router(config-if)#ip access-group 99 in Router(config-if)#ip access-group 99 out Router(config-if)#exit Router(config)#
C.Router(config)#interface g0/1 Router(config-if)#ip access-group 30 in Router(config-if)#ip access-group 30 out Router(config-if)#exit Router(config)#access-list 30 deny 10.0.0.0 0.255.255.255 Router(config)#access-list 30 deny 192.168.0.0 0.0.255.255 Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255 Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255 Router(config)#access-list 30 permit any
D.Router(config)#access-list 60 deny 10.0.0.0 0.255.255.255 Router(config)#access-list 60 deny 192.168.0.0 0.0.255.255 Router(config)#access-list 60 deny 127.0.0.0 0.255.255.255 Router(config)#access-list 60 deny 172.16.0.0 0.15.255.255 Router(config)#access-list 60 permit any Router(config)#interface g0/1 Router(config-if)#ip access-group 160 in Router(config-if)#ip access-group 160 out Router(config-if)#exit Router(config)#
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