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... This is why many Asian ISPs have already begun to roll out IPv6 commercially. ... The answer to that challenge is IPv6.” By Swiss IPv6 Task Force. With address space running out so quickly IPv6 had to be designed. IPv6 offers a new and well designed protocol stack which takes into consideration features that IPv4 does not offer such as larger address space and built in security. Addressing using IPv6 has allowed address space of 128 bits compared to 32 bits with IPv4, the limit on addresses has been extended from a theoretical 4 billion to 340 trillion.
Technical Aspect
Addressing
The differences between IPv4 and IPv6 are not extremely complex. ... IPv6 uses a 128-bit addressing scheme that contains hexadecimal numbering system, which is a 16-base consisting of numbers 0-9 and letters A-F separated by colons. An example of an IPv6 address would be: 32DC:00B3:0000:0000:04AA:00FF:FB28:9C5A. IPv6 addresses might contain long sequences of zeros. ... To further simplify the representation of IPv6 addresses, a contiguous sequence of 16-bit blocks set to 0 in the colon-hexadecimal format can be compressed to :: (known as double-colon). ... com
Header
IPv6 has also changed the header for IP Packets to allow for the 128-bit addressing scheme. ... In the new IPv6 header, the headers now only contains 6 fields which are version, priority, flow label, payload length, next header, and hop limit. ... The IPv6 header is always present and is a fixed size of 40 bytes.
The IPv6 header
www. ... com
The IPv6 header is much simpler than the IPv4 header. ... The flow label field can be used by a host to request special handling from IPv6 routers. ... Whereas the IPv6 headers length is fixed, the protocol can add many other extension headers to the main header. These additional headers provide features such as source routing, encryption, and authentication. The payload length field describes the length in octets of the data portion of the IPv6 packet.
Approximate Word count = 1575
Approximate Pages = 6.3
(250 words per page double spaced)
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