Thursday, February 3, 2011


Its time for IPV6:
As Calculated this week on feb 1st IPV4 was exhausted ,
and now its time for IPV6 to take charge , it was quit strange when IPv6 was developed by the Internet Engineering Task Force (IETF) because IPv6 uses a 128-bit address and the new address space supports 2128 ( 3.4×1038) addresses which is massive when compared to IPV4 .
The most important feature of IPv6 is a much larger address space than in IPv4. IPv6 addresses are 128 bits long, compared to only 32 bits previously.While the
IPv4 address space contains only about 4.3×109 (4.3 billion) addresses,
IPv6 supports approximately 3.4×1038 (340 undecillion) unique addresses, 
deemed enough for the foreseeable future.
IPv6 addresses are written in groups of four hexadecimal digits separated by colons, for example, 2001:0db8:85a3:0000:0000:8a2e:0370:7334. IPv6 addresses are logically divided into two parts: a 64-bit (sub-)network prefix, and a 64-bit interface identifier.

An IPv6 address is represented by 8 groups of 16-bit hexadecimal values separated by colons

The 128-bit IPv6 address can be abbreviated with the following rules:
  • Rule one: Leading zeroes within a 16-bit value may be omitted. For example, the address fe80:0000:0000:0000:0202:b3ff:fe1e:8329 may be written as fe80:0:0:0:202:b3ff:fe1e:8329
  • Rule two: A single occurrence of consecutive groups of zeroes within an address may be replaced by a double colon. For example, fe80:0:0:0:202:b3ff:fe1e:8329 becomes fe80::202:b3ff:fe1e:8329

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