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某公司的网络中包括两个部门，即上级部门（A）和下级部门（B），原来网络连接一直很正常。但最近，部门B的网络不能访问部门A的网络，使用部门B的计算机（IP地址为192.168.2.201/24）Ping部门A中的计算机A1（IP地址为192.168.2.100/24）和计算机A2（IP地址为192.168.2.110/24）时，发现丢包率为{bfb}，如图3-20所示。而使用Ping命令测试本部门的计算机时，连接正常。

access-list 190 deny ip 192.168.0.0 0.255.255.255 any
access-list 190 deny ip 192.168.3.0 0.255.255.255 any
access-list 190 deny ip 192.168.4.0 0.255.255.255 any
access-list 190 deny ip 192.168.5.0 0.255.255.255 any
access-list 190 deny ip 192.168.6.0 0.255.255.255 any
access-list 190 deny ip 192.168.7.0 0.255.255.255 any
access-list 190 deny ip 192.168.8.0 0.255.255.255 any
access-list 190 deny ip 192.168.9.0 0.255.255.255 any
access-list 190 deny ip 192.168.10.0 0.255.255.255 any

access-list 190 deny ip 192.168.0.0 0.0.0.255 any
access-list 190 deny ip 192.168.3.0 0.0.0.255 any
access-list 190 deny ip 192.168.4.0 0.0.0.255 any
access-list 190 deny ip 192.168.5.0 0.0.0.255 any
access-list 190 deny ip 192.168.6.0 0.0.0.255 any
access-list 190 deny ip 192.168.7.0 0.0.0.255 any
access-list 190 deny ip 192.168.8.0 0.0.0.255 any
access-list 190 deny ip 192.168.9.0 0.0.0.255 any
access-list 190 deny ip 192.168.10.0 0.0.0.255 any