There are 5 classes : A, B, C, D, E
byte1 byte2 byte3 byte4
|<---------------->|<---------------->|<---------------->|<---------------->|
Class A |0 Net ID | Host ID |
Class B |10 Net ID | Host ID |
Class C |110 Net ID | Host ID |
Class D |1110 Multicast Address |
Class E |1111 Reserved for future use |
Now Class A addresses are numberically the lowest they use 1 byte to identify class type and net id.
Now number of net ids possible in class A are : 2^7 and number of hosts possible are 2^24
Similarily number of net ids possible in class B are : 2^14 and number of hosts possible are : 2^16
Number of net ids possible in class C are : 2^21 and number of hosts possible are:2^8
We can represent these addresses as string of 1 and 0 like:
10000000 00001011 00000011 00011111
or we have dotted decimal notation to represent the same address in decimal numbers, with
each byte being separated by a '.' i.e.:
128.11.3.31
Class Ranges of Internet addresses
From To
Class A 0.0.0.0 127.255.255.255
Class B 128.0.0.0 191.255.255.255
Class C 192.0.0.0 223.255.255.255
Class D 224.0.0.0 239.255.255.255
Class E 240.0.0.0 240.255.255.255
Keywords: class full addresses, class full addressing, classfull addresses, classfull addressing, ip addressing
