A.Class A B.Class B C.Class C D.Class D
A.network 10.0.0.0 B.network 127.0.0.0 C.network 129.135.0.0 D.network 192.168.0.0
A.129.0.0.99 B.129.255.0.1 C.224.0.0.1 D.254.0.0.1