题目内容:
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-list90denyicmpl68.27.95.0255.255.255.0anyaccess-list90denyicmpanyanyaccess—list90permitipanyany B.access-listl00permiticmpl68.27.95.00.0.0.255anyaccess-listl00permitipanyany
C.access—listllopermiticmpl68.27.95.0255.255.255.0anyaccess—listllodenyicmpanyany
D.access-listl20permiticmpl68.27.95.00.0.0.255anyaccess—listl20denyicmpanyanyaccess—listl20permitipanyany
参考答案:
答案解析: