单项选择题

cisco路由器执行show access-list的命令显示如下一组信息
Standard IP access list block
deny 10.0.0.0，wildcard bits 0.255.255.255 log
deny 172.16.0.0，wildcard bits 0.15.255.255
permitany
根据上述信息，正确的access-list配置是（）。

A.Rounter(conflg)#access-list standard block
Rounter(config-std-nacl)#deny 10.0.0.0 255.0.0.0 log
Rounter(config-std-nacl)#deny 172.16.0.0 255.240.0.0
Rounter(config-std-nacl)#permit any
B.Rounter(config)#IP access-list standard block
Rounter(config-std-nacl)#permit any
Rounter(config-std-nacl)#deny 10.0.0.0 0.255.255.255 log
Rounter(config-std-nacl)#deny 172.16.0.0 0.15.255.255
C.Rounter(config)#IP access-list standard block
Rounter(config-std-nacl)#deny 10.0.0.0 255.0.0.0 log
Rounter(config-std-nacl)#deny 172.16.0.0 255.240.0.0
Rounter(config-std-nacl)#permit any
D.Rounter(config)#access-list standard block
Rounter(config-std-nacl)#deny 10.0.0.0 0.255.255.255 log
Rounter(config-std-nacl)#deny 172.16.0.0 0.15.255.255
Rounter(config-std-nacl)#permit any

<上一题 目录 下一题>
热门 试题

单项选择题
定义一个用于封禁ICMP协议而只允许转发166.129.130.0 24子网的ICMP数据包的访问控制列表，Cisco路由器的正确配置是（）。

A.access-list 198 permit icmp 166.129.130.0 255.255.255.0 any
access-list 198 deny icmp any any
access-list 198 permit ip any any
B.access-list 198 permit icmp 166.129.130.0 0.0.0 255 any
access-list 198 deny icmp any any
access-list 198 permit ip any any
C.access-list 99 permit icmp 166.129.130.0 0.0.0 255 any
access-list 99 deny icmp any any
access-list 99 permit ip any any
D.access-list 100 permit icmp 166.129.130.0 0.0.0 255 any
access-list 100 permit ip any any
access-list 100 deny icmp any any
单项选择题
在一台Cisco路由器上封禁ICMP协议，只允许215.192.40.16 28和202.204.28.2 24子网的ICMP数据包通过路由器，下列正确的access-list配置是（）。

A.Router rconfig)#access-list 98 permit icmp 215.192.40.16 0.0.0.15 any
Router(config)#access-list 98 permit icmp 202.204.28.0 0.0.0.255 any
Router(config)#access-list 98 deny icmp any any
Router(config)#access-list 98 permit ip any any
Router(config)#
B.Router(config)#access-list 198 permit icmp 215.192.40.16 0.0.0.15 any
Router(config)#access-list 198 permit icmp 202.204.28.0 0.0.0.255 any
Router(config)#access-list 198 permit ip any any
Router(config)#access-list 198 deny icmp any any
Router(config)#
C.Router(config)#access-list 198 permit icmp 215.192.40.16 0.0.0.15 any
Router(config)#access-list 198 permit icmp 202.204.28.0 0.0.0.255 any
Router(config)#access-list 198 deny icmp any any
Router(config)#access-list 198 permit ip any any
Router(config)#
D.Router(config)#access-list 100 permit icmp 215.192.40.16 255.255.255.240 any
Router(config)#access-list 100 permit icmp 202.204.28.0 255.255.255.0 any
Router(config)#access-list 100 deny icmp any any
Router(config)#access-list 100 permit ip any any
Router(config)#
相关试题