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→Types of IPv6 Addresses
{{Glossary|
{{Glossary|
|note = <div align="center">This article is neutral, but is [[Sponsorship|sponsored]] by [[PIR]], the registry for .org,<br>which first deployed IPv6 in 2008.<br> More info on their services can be found [http://pir.org/home here].
|note =
|logo = PIR_Logo.png
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|bronzesponsor = ICANNWiki [[Sponsorship|Bronze Sponsor]]
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'''IPv6 (Internet Protocol Version 6)''' is the version of internet protocol which supports the 128-bit [[IP Address|IP addresses]]. It has been developed as the next generation protocol to increase the 4 billion IP Addresses available and it will eventually replace the nearly exhausted [[IPv4]], which supports 32-bit address space.<ref>[http://www.iana.org/about/glossary/ www.iana,org]</ref> IPv6 has been developed to provide advantages over the current internet protocol. It is expected to solve several network problems by eliminating the need for [[NAT|Network Address Translation]] (NAT).
'''Internet Protocol Version 6 (IPv6)''' is the version of [[Internet protocol]] which supports the 128-bit [[IP Address|IP addresses]]. It has been developed as the next generation protocol to increase the 4 billion IP Addresses available and it will eventually replace the nearly exhausted [[IPv4]], which supports 32-bit address space.<ref>[http://www.iana.org/about/glossary/ www.iana,org]</ref> IPv6 has been developed to provide advantages over the current internet protocol. It is expected to solve several network problems by eliminating the need for [[NAT|Network Address Translation]] (NAT).
In late December 2015, IPv6 reached 10% adoption worldwide. <ref>[http://arstechnica.com/business/2016/01/ipv6-celebrates-its-20th-birthday-by-reaching-10-percent-deployment/ Ars Technica-IPv6 Reaches 10%]</ref>
==Background==
==Background==
# Enhanced multicast support with increased addresses and efficient mechanisms
# Enhanced multicast support with increased addresses and efficient mechanisms
==IPv6 Address Notation==
==IPv6 Address Notation Vs IPV4 Address Notation==
Consider the following for example, the IPv4 address "192.168.100.32" may appear in IPv6 notation as "0000:0000:0000:0000:0000:0000:C0A8:6420" or "::C0A8:6420".
An IPv6 address is written in hexadecimal quartets separated by colon for example: 2001:cdba:1900:0000:0000:0000:1757:3618 If there is a four-digit group of zeroes within an IPv6 address, it can be reduced to a single zero and delete the group of 4 zeroes and the address can be written as:2011:cdba:1900:0:0:0:1757:3818 or 2001:cdba:1900:3257:9652<ref>[http://ipv6.com/articles/general/IPv6-Addressing.htm IPv6 Address Notation]</ref>
An IPv6 address is written in hexadecimal quartets separated by colon for example: 2001:cdba:1900:0000:0000:0000:1757:3618 If there is a four-digit group of zeroes within an IPv6 address, it can be reduced to a single zero and delete the group of 4 zeroes and the address can be written as:2011:cdba:1900:0:0:0:1757:3818 or 2001:cdba:1900:3257:9652<ref>[http://ipv6.com/articles/general/IPv6-Addressing.htm IPv6 Address Notation]</ref>
The most obvious benefit of IPv6 is the exponentially greater number of IP addresses it can support compared to IPv4. Many countries outside the U.S. suffer from a shortage of IP addresses today. Because IPv6 and IPv4 protocols coexist, those locales with an address shortage can easily deploy new IPv6 networks that work with the rest of the Internet. Experts believe it will take many more years before all networks fully change over to IPv6.
Other benefits of IPv6 are less obvious but equally important. The internals of the IPv6 protocol have been designed with scalability and extensibility in mind. This will allow many different kinds of devices besides PCs, like cell phones and home appliances, to more easily join the Internet in future.
==Types of IPv6 Addresses==
==Types of IPv6 Addresses==
IPv6 has three types of addresses:
IPv6 supports the following three IP address types:
* [[Unicast Address]], which serves as a single interface identifier and it is delivered to the interface identified by the address;
* [[Unicast Address]]
* [[Multicast Address]], an identifier for a group/set of interfaces that may belong to the different nodes delivered to multiple interfaces
* [[Anycast Address]], an identifiers for a set of interfaces that may belong to different nodes and it is delivered to any of the interfaces identified by the address.<ref>[http://ip6.com/articles/general/IPv6-Addressing.htm Types of IPv6 Address]</ref>
* [[Multicast Address]]
* [[Anycast Address]]
Unicast and multicast messaging in IPv6 are conceptually the same as in IPv4. IPv6 does not support broadcast, but its multicast mechanism accomplishes essentially the same effect. Multicast addresses in IPv6 start with 'FF' (255) just like IPv4 addresses.
Anycast in IPv6 is a variation on multicast. Whereas multicast delivers messages to all nodes in the multicast group, anycast delivers messages to any one node in the multicast group. Anycast is an advanced networking concept designed to support the failover and load balancing needs of applications.
IPv6 reserves just two special addresses: 0:0:0:0:0:0:0:0 and 0:0:0:0:0:0:0:1. IPv6 uses 0:0:0:0:0:0:0:0 internal to the protocol implementation, so nodes cannot use it for their own communication purposes. IPv6 uses 0:0:0:0:0:0:0:1 as its loopback address, equivalent to 127.0.0.1 in IPv4.
Also Known As: IPng (Internet Protocol Next Generation)
==IPv6 Special Addresses==
==IPv6 Special Addresses==
==IPv4 Final Depletion==
==IPv4 Final Depletion==
On February 3, 2011, [[ICANN]] along with the [[NRO|Number Resources Organization]] (NRO), the [[IAB|Internet Architecture Board]] (IAB) and the [[ISOC|Internet Society]] (ISOC) informed the global Internet community that the remaining IPv4 addresses were all allocated by the [[IANA|Internet Assigned Names and Numbers]] (IANA) to the [[RIR|Regional Internet Registries]] (RIRs) .ICANN's President and CEO, [[Rod Beckstrom]], noted that IPv6 adoption is very important and the Internet technical community had been planning and working for a long period of time to deploy IPv6 when IPV4 addresses are completely depleted. In addition, [[Raúl Echeberría]], Chairman of the [[NRO]], emphasized that “deploying IPv6 is now a requirement, not an option".<ref>[http://www.icann.org/en/news/releases/release-03feb11-en.pdf Available Pool of Unallocated IPv4 Internet Addresses Now Completely Emptied]</ref>
On February 3, 2011, [[ICANN]] along with the [[NRO|Number Resources Organization]] (NRO), the [[IAB|Internet Architecture Board]] (IAB) and the [[ISOC|Internet Society]] (ISOC) informed the global Internet community that the remaining IPv4 addresses were all allocated by the [[IANA|Internet Assigned Names and Numbers]] (IANA) to the [[RIR|Regional Internet Registries]] (RIRs). ICANN's President and CEO at the time, [[Rod Beckstrom]], noted that IPv6 adoption is very important and the Internet technical community had been planning and working for a long period of time to deploy IPv6 when IPV4 addresses are completely depleted. In addition, [[Raúl Echeberría]], Chairman of the [[NRO]], emphasized that “deploying IPv6 is now a requirement, not an option".<ref>[http://www.icann.org/en/news/releases/release-03feb11-en.pdf Available Pool of Unallocated IPv4 Internet Addresses Now Completely Emptied]</ref>
==World IPv6 Day==
==World IPv6 Day==
[[Category: Glossary]]
[[Category: Glossary]]
[[Category: Acronym]]