IP ADDRESS CLASSES AND DEFAULT SUBNET MASKS

   IP Address are grouped into 5 classes. Classes A, B, and C are commercial addresses and are assigned to hosts. Class D is reserved for multicast use and Class E is for experimental use.

   Class C addresses have three octets for the network portion and onefor the hosts. The default subnet masks is 24 bits ( 255.255.255.0 ) Class C addresses are usually assigned to small networks.

Ip address network

     Class B address have two octets to represent the network portion and two for the hosts. The default subnet masks 16 bits ( 255. 255. 0.0 ). These addresses are typically used for medium –sized networks.

      Class A addresses have only one octet to represent the network portion and three to represent the hosts. The default subnet masks is 8 bits ( 255. 0,0,0 ). These addresses are typically assigned to large organizations.