Thread: IP Adresses

IP is the unique value which represents your system on a TCPj1P network. It is a 32 bit identifier which is represented by four numbers separated by periods known as octet. Each 1P value has 8-bit fields, for example, 192.168.75.38. Each host has its unique identification number assigned by the network administrator. An 1P address is divided in to two parts-a networks 10 and a host 10. The network 10 address is same for all the hosts on the same network and the host 10 is different for all the hosts on the same network and can be same for different networks. According to above example 192.168.75 is the network 10 and 38 is the particular host 10. There are some fundamental ruks regarding identification numbers as:

• IP address can not be duplicated

• All host bits can not be set to zero

• All host bits can not be set to one

• 127 can not be taken as a number in the first octet because it is reserved as a loopback address.

The 1P addresses can be classified into three types, which are:



• Class A: These networks use the first a-bits of IP address to identify the network address and remaining 24 bits to identify the individual host. Class A has up to 224 different host IDs, which means the network can have up to 16.777.214 hosts.

• Class B: These networks use the first 16 bits of the IP address to identify the network 10 and remaining 16 bits to identify the host 10. A class B have up to 216 different host IDs, so the network can have up to 65,534 hosts.

• Class C: These networks use the first 24 bits for the network's 10 and the remaining a bits for the host 10. A class C have up to 28 different host IDs, so the network can have up to 254 hosts.

How let us understand how we can find out the class of a given address. This can be identified by the octet value as shown in the table on the next page.