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Different classes for IP addressing

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arunragavan

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Hello guys,

I have a few questions --

There are different classes for IP addressing

32-bit IP address with octate representation and maximum range from 0-255 representation for the same.

Like Class A - range from 1-126 - for the first octate with the format being

_____________________
|Network|Host|Host|Host|
------------------------------
This is for the class A IP addressing method and that for class B the range of the first octate is from 128-191.

________________________
|Network|Network|Host|Host|
----------------------------------


and for class C IP addressing method, the range of the first octane is 192-223.

____________________________
|Network|Network|Network|Host|
---------------------------------------

There is Class D (224-239) and Class E (240-255) , which can be used for further WAN and AI networks.

THE QUESTION IS

I want to know the reason why 127 is not considered when we have a transisiton from Class A and Class B networks?

and on what basis the range of these networks have been divided like the range of these networks specified as accoring to the Class?

with regards,
arun
 

arunragavan

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range of first octate

ok guys ive already foundout that the IP - 127.0.0.0 (network address) - 127.0.0.1 to 127.255.255.255 is used for IP lookback, that is testing the data which is sent through the ethernet, so this IP address range between 127.0.0.1-127.255.255.255 cannot be used to put data in the communication channel but insted it is looped back to application which tests the channel.

with regards,
arun
 

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