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，正确的配置是(61) 。

A．access-list 90 deny icmp l68．27．95．0 255．255．255．0 any access-list 90 deny icmp any anyaccess—list 90 permit ip any any

B．access-list l00 permit icmp l68．27．95．0 0．0．0．255 any access-list l00 permit ip any any

C．access—list l l o permit icmp l68．27．95．0 255．255．255．0 any access—list l lo deny icmp any any

D．access-list l20 permit icmp l68．27．95．0 0．0．0．255 any access—list l20 deny icmp any any access—list l20 permit ip any any

[单选题]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 anyB．access-list 198 permit icmp 166.129.130.0 0.0.0.255

[单选题]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 anyaccess-list 198 deny icmp any anyaccess-list 198 permit ip any anyB．) access-list 198 permit icmp 166.129.130.0 0.0

[单选题]用标准访问控制列表配置只允许212.33.127.0/24子网主机登录到路由表，正确的配置是______。A．Router(config) #access-list 10 permit 212.33.127.0 255.255.255.0 Router(config) #line vty 0 5 Router(config-line) #access-class 10 inB．Router(config) #access-list 20 permit 212.33.127.0 0.0.0.255

[单选题]用标准访问控制列表配置只允许212.33.127.0/24子网主机登录到路由表，正确的配置是（　　）。A.B.C.D.

[单选题]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 anyB．access-list 100 permit ip any any access-list 100 deny ip host

[单选题]用标准访问控制列表配置212.33.127.0/24子网主机登录到路由表，虚拟的配置是A．Router(config)#access-list 10 permit 212.33.127.0 255.255.255.0 Router(config)#line vty 0 5 Router(config-line)#access-class 10 inB．Router(config)#access-list 20 permit 212.33.127.0 0.0.0.255 Router(config

[单选题]在Cisco路由器上，用扩展访问控制列表封禁IP地址为21102.33.24的主机，正确的配置语句是（　　）。A.access-list99denyi

[单选题]在Cisco路由器上，用扩展访问控制列表封禁IP地址为21102.33.24的主机，正确的配置语句是（　　）。A.B.C.D.

[单选题]在 Cisco 路由器匕用扩展访问控制列表封禁 1P 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 anyaccess-list 99 deny ip any host 211.102.33.24access-list 99 permit ip any anyB． ）access-list 100 permit ip any anyaccess-list 100 deny ip host 2

[单选题]封禁ICMP协议，只转发212.78.170.166/27所在子网的所有站点的ICMP数据包，正确的accesslist配置是（　　）。A.B.C.D