---

the third firewall should be configured

allow production and administrative departments to access internet

compare the IP addresses of the two departments

< table > < thead > < tr > < th > Department < / th > < th > IP address < / th > < th > Mask < / th > < th > binary < / th > < / tr > < / thead > < tbody > < tr > < td > production < / td > < td > 192.168.10.0 < / td > < td > 24 < / td > < td > 192 11000000, 168 10101000, 10 1010, 0:0 < / td > < / tr > < tr > < td > Administration < / td > < td > 192.168.11.0 < / td > < td > 24 < / td > < td > 192 11000000, 168 10101000, 11V 1011, 0:0 < / td > < / tr > < / tbody > < / table >

as can be seen from the binary system, 192.168.10.0 strong 23 contains two departments.