【名词&注释】
预防措施(preventive measures)、安全问题(security problem)、网络设备(network equipment)、物理层(physical layer)、特定条件(special conditions)、端口号(port number)、数据链路层(data link layer)、网络连接设备(network connection devices)、源地址(source address)、局域网交换机(lan switch)
[单选题]Cisco路由器执行show access-list命令显示如下一组信息 Standard IP access list block deny 10.0.0.0, wildcardbits 0.255.255.255 log deny 172.16.0.0, wildcard bits 0.15.255.255 permit any 根据上述信息,正确的access-list配置是
A. Router (config) access-list standard block Router (config-std-nacl) deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) permit any
B. Router (config) ip access-list standard block Router (config-std-nacl) permit any Router (config-std-nacl) deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) deny 172.16.0.0 0.15.255.255
C. Router (config) ip access-list standard block Router (config-std-nacl) deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) permit any
D. Router (config) ip access-list standard block Router (config-std-nacl) deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) deny 172.16.0.0 0.15.255.255 Router (config-std-nacl) permit any