There are five different classes of IP address A, B,
C, D and E network.
|
Class Name
|
Range of address
|
|
Class-A
|
1.0.0.0
to 127.255.255.255
|
|
Class-B
|
128.0.0.0
to 191.255.255.255
|
|
Class-C
|
192.0.0.0
to 223.255.255.255
|
|
Class-D
|
224.0.0.0
to 239.255.255.255
|
|
Class-E
|
240.0.0.0
to 247.255.255.255
|
Figure:
Classes of IP address
In a class A address, the first octet is the network
portion, so the class A example in Figure has a major network address of 10,
octets 2, 3 and 4 are for the network manager to divide into subnets and hosts
as he / she sees fit. Class A address is used for networks that have more than
65,536 hosts.
In a class B address, the first two octets are the
network portion, so the class B example in figure has a major network address
of 172.16.octets 3 and 4 (16 bits) are for local subnets and hosts. Classes B address
is used for networks that have between 256 and 65534 hosts.
In a class C address, the first three octets are the
network portion. The class C example in Figure has a major network address of
193.18.9. Octet 4 (8bits) is for local subnets and hosts perfect for networks
with less than 254 hosts.
Class D address, used for multicasting to a number
of hosts. Packets are passed to a selected subset of hosts on a network. The
four high-order bits in a class D address are always set to 1110. The reaming
bits are for the address that registered hosts will recognize. Windows Embedded
CE supports class D addresses for applications to multicast data to hosts.
Class E address reserved for future use. An
experimental address, high-order bits in a class E address are set to 1111.
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