用扩展访问控制列表配置封禁ICMP协议，只允许l68．27．95．0／24子网的ICMP数据包通过路由器，正确的配

A．

B．

C．

D．

A.A

B.B

C.C

D.D

A．

B．

C．

D．

A.A

B.B

C.C

D.D

A.access-list 198 permit icmp 166．129．130．0 255．255．255．0 anyaccess-list 198 deny iemp any anyaccess-list 198 permit ip any any

B.access-list 198 permit icmp 166．129．130．0 0．0．0．255 anyaccess-list 198 deny iemp any anyaccess-list 198 permit ip any any

C.access-list 99 permit icmp 166．129．130．0 0．0．0．255 anyaccess-list 99 deny iemp any anyaccess-list 99 permit ip any any

D.access-list 100 permit icmp 166．129．130．0 0．0．0．255 anyaccess-list 100 permit ip any anyaccess-list 100 deny icmp any any

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 pernut ip any any

access-list 100 deny icmp any any

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 icnip 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

在Cisco路由器上，用扩展访问控制列表封禁IP地址为211.102.33.24的主机，正确的配置语句是______。

A．access-list 99 deny ip host 211.102.33.24 any access-list 99 deny ip any host 211.102.33.24 access-list 99 permit ip any any

B．access-list 100 permit ip any any access-list 100 deny ip host 211.102.33.24 any access-list 100 deny ip any host 211.102.33.24

C．access-list 199 deny ip host 211.102-33.24 any access-list 199 deny ip any host 211.102.33.24 access-list 199 permit ip any any

D．access-list 166 deny ip host 211.102.33.24 any access-list 166 permit ip any any

A ）

access-list 99 deny ip host 211.102.33.24 any

access-list 99 deny ip any host 211.102.33.24

access-list 99 permit ip any any

B ）

access-list 100 permit ip any any

access-list 100 deny ip host 211.102.33.24 any

access-list 100 deny ip any host 211.102.33.24

C ）

access-list 199 deny ip host 211.102.33.24 any

access-list 199 deny ip any host 211.102.33.24

access-list 199 permit ip any any

D ）

access-list 166 deny ip host 211.102.33.24 any

access-list 166 permit ip any any

用标准访问控制列表封禁非法地址192.168.0.0/16的数据包进出路由器的正确配置是

A.access-list 110 deny 192.168.0.0 0.0.255.255 access-list 110 permit any

B.access-list 10 deny 192.168.0.0 255.255.0.0 access-list 10 permit any

C.access-list 50 permit any access-list 50 deny 192.168.0.0 0.0.255.255

D.access-list 99 deny 192.168.0.0 0.0.255.255 access-list 99 permit any

A.access-list-number：访问控制列表号，扩展ACL取值是100-199。

B.permit|deny：如果满足规则，则允许/拒绝通过。

C.protocol：用来指定协议的类型，如IP，TCP，UDP，ICMP等。

D.source、destination：源和目的，分别用来标示源地址和目的地址。

以下哪项不是配置扩展访问控制列表的方法？——

A．用名字标识访问控制列表的配置方法

B．用数字标识访问控制列表的配置方法

C．使用access—list命令

D．使用ip access—list命令