题目内容：

Cisco
Router(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Router(config)#ip nat pool wan 120.199.2.113 120.199.2.114 netmask 255.255.255.252
Router(config)#ip nat inside source list 1 pool wan overload
Router(config)#ip route 0.0.0.0 0.0.0.0 120.199.2.112
Router(config)#exit