The IP addressing is of two types. One is IPV4 and the other one is IPV6. Here we will tell you, what is IPV4 protocol. It is a combination of 32 bit, with three different classes.

The IP address for IPV4 is divided into three network Partitions. These classes are:

- CLASS A
- CLASS B
- CLASS C

**Class A** is configured as **N.H.H.H/8 Bits**. Class A is represented as **XXXXXXXXX.00000000.00000000.000000000** where the network bits are represented as x and the host is represented as zero. The octet of Class A is 8 Bits and the number of networks that can be assigned to class A is **128**. The number of hosts per Networks will be **16677214**. The calculations used in the same as follow:

**No. of Networks = 2^ (8-1) = 128 (-1 is because of Parity bits) **

**Number of hosts will be 2^24 – 2 = 16777216 – 2 = 16677214 hosts per networks**

**Class B** is configured as **N.N.H.H/16 Bits**. Class B is represented as **XXXXXXXXX.XXXXXXXX.00000000.000000000**. The octet of Class B is 16 Bit and the number of networks that can be assigned to class A is **16384** Networks. The number of hosts per Networks will be **65534**. The calculations used in the same areas follow:

**No. of Networks = 2^ (16-2) = 16384 (-2, because of Parity bits) **

**Number of hosts will be 2^16-2 = 65536– 2 = 65534 hosts per networks**

**Class C **is configured as **N.N.N.H/24 Bits**. Class C is represented as **XXXXXXXXX.XXXXXXXX.XXXXXXXX.000000000**. The octet of Class C is 24 Bit and the number of networks that can be assigned to class A is **16384** Networks. The number of hosts per Networks will be **1677214**. The calculations used in the same as follow:

**No. of Networks = 2^ (24-2) = 4194304 (-2, because of Parity bits) **

**Number of hosts will be 2^16-2 = 1677216 – 2 = 1677214 Hosts per networks**

As we Switched from Class A to Class C, Number of networks will be increased and the number of hosts will be decreased. There are complementary to each other as per the increasing and decreasing order.

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