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What is IPv6

Source: Shangpin China | Type: website encyclopedia | Time: June 28, 2014
IPv6 is the abbreviation of Internet Protocol Version 6. IPv6 is designed by IETF {(Internet Engineering Task Force) to replace the next generation IP protocol of the current version of IP protocol (IPv4).

The research and application of IPv6, on the one hand, is due to the limitation of IPv4 address resources; on the other hand, with the development of electronic technology and Website construction With the development of technology, computer network will enter people's daily life. Every electronic device around needs to be connected to the Internet. Digitally speaking, IPv6 has an address capacity of about 8 X 10 of IPv4 twenty-eight Times, up to 2 I28 -1. This not only solves the problem of the number of network address resources, but also removes the limit on the number of other devices connected to the Internet except computers.

Technical Features of IPv6

IPv6 is a new generation Internet protocol that can almost unlimited increase the number of IP addresses, has huge address space and excellent network security performance. The technical characteristics of IPv6 are as follows.

Huge address space: The address space of IPv6 has expanded from 32 bits of IPv4 to 128 bits, and 21 "has formed a huge address space. With IPv6 technology, future mobile phones, refrigerators and other information appliances can all have a unique IP address.

The address hierarchy is rich and the allocation is reasonable: the IPv6 management organization allocates a certain TLA (top-level cluster identifier, the highest level in the routing hierarchy) to some backbone network ISPs, and then the backbone network ISPs flexibly allocate NLA (the next level cluster identifier of the TLA, used to create the addressing hierarchy and identify the site) to each small and medium-sized ISP Small ISP obtains IP address. Implementation of iP layer network security: IPv6 requires mandatory implementation of the Internet security protocol IPSec, which has been standardized. IPSe。 It supports authentication header protocol, encapsulation security payload protocol and key exchange IKE protocol. These three protocols will be the security standards of the future Internet.

Stateless automatic configuration: IPv6 can automatically configure the interface address and recognize the router information for the host through the neighbor discovery mechanism, so that the connection from the Internet to the end user can be quickly established without user intervention.
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