全文可编辑可打印 2021年全国计算机等级考试三级网络工程NCRE 教育机构内部真考题库A.Router(config)#ip access-list extended filter

Router(config-ext-nacl)#permit icmp 212.15.41.0 255.255.255.192 any

Router(config-ext-nacl)#deny icmp any any

Router(config-ext-nacl)#deny udp any any eq 1434

Router(config-ext-nacl)#deny tcp any any eq 139

Router(config-ext-nacl)#permit ip any any

Router(config-ext-nacl)#exit

Router(config)#interface g3/1

Router(config-if)#ip access-group filter in

Router(config-if)#ip access-group filter out

B.Router(config)#ip access-list extended filter

Router(config-ext-nacl)#permiticmp 212.15.41.0 0.0.0.192 any

Router(config-ext-nacl)#deny icmpany any

Router(config-ext-nacl)#denyudp any any eq 1434

Router(config-ext-nacl)#denytcp any any eq 139

Router(config-ext-nacl)#permit ip any any

Router(config-ext-nacl)#exit

Router(config)#interface g3/1

Router(config-if)#ip access-group filter in

Router(config-if)#ip access-group filter out

C.Router(config)#ip access-list standard filter

Router(config-std-nacl)#permit icmp 212.15.41.0 0.0.0.63 any

Router(config-std-nacl)#deny icmp any any

Router(config-std-nacl)#deny udp any any eq 1434

Router(config-std-nacl)#deny tcp any any eq 139

Router(config-std-nacl)#permit ip any any

Router(config-std-nacl)#exit

Router(config)#interface g3/1

Router(config-if)#ip access-group filter in

Router(config-if)#ip access-group filter out

D.Router(config)#ip access-list extended filter

Router(config-ext-nacl)#permit icmp 212.15.41.0 0.0.0.63 any

Router(config-ext-nacl)#deny icmp any any

Router(config-ext-nacl)#deny udp any any eq 1434

Router(config-ext-nacl)#deny tcp any any eq 139

Router(config-ext-nacl)#permit ip any any

Router(config-ext-nacl)#exit

Router(config)#interface g3/1

Router(config-if)#ip access-group filter in

Router(config-if)#ip access-group filter out

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