For IP, you may not be unfamiliar. Speaking of "IPv4" and "IPv6", you may know what is going on, "IPv9" Have you heard of it? Ok, actually, I don't know what "IPv9" is. I found a lot of information on the Internet to figure it out. Now I will share this knowledge with you.
Ipv4 and ipv6 are the protocol families used by the current global Internet. The TCP/IP protocol is that the number of IPv4 addresses is 32 bits, that is, the maximum number of 32 computers can be connected to the Internet at the same time. Over the years, due to the booming development of the Internet, the demand for IP addresses has become larger and larger, making the distribution of IP addresses more and more strict. Let's learn about ipv4, ipv6, and ipv9.
Ipv4, ipv6 resources have been exhaustedAccording to various data, the global IPv4 address may be completed in 2010. While ipv6 uses a 128-bit address length, it can provide an address almost unrestricted. The IPv6 actually assignable address is estimated in a conservative way, and more than 1000 addresses can be allocated per square meter of the entire earth.
In the design process of IPv6, in addition to solving the address shortage problem once and for all, it also considers other problems that are not well solved in IPv4, mainly end-to-end IP connection, quality of service (QoS), security, multicast, mobile Sex, plug and play, etc., 2011 is a key year for the development of IPv6 and the Internet. The last batch of IPv4 addresses in the world has been allocated, and the transition from the Internet to IPv6 has begun to enter the implementation phase.
What is ipv9?Let's talk about ipv9, the IPv9 technology (or called the decimal network) that used to maintain China's network sovereignty a few years ago is now silent. The inventor Xie Jianping, the decimal network standard working group and its academic team have always been " Commercial secrets refused to disclose the technical details about IPv9. Recently, ipv9 has appeared in the pursuit of some domestic friends, saying that it is ipv9. Simple can be understood. The biggest feature of IPv9 is the use of decimal numbers for URL encoding. This means that users can enter a simple numeric domain name such as "12345" to replace a domain name like "".
What are the characteristics and advantages of IPv6 compared to IPv4?
IPv6 has a larger address space. In IPv4, the IP address length is 32, that is, there are 2^32-1 addresses; and the length of the IP address in IPv6 is 128, that is, there are 2^128-1 addresses. And with a smaller routing table, the IPv6 address allocation follows the principle of clustering (AggregaTIon), which enables the router to use a record (Entry) in the routing table to represent a subnet, greatly reducing the routing in the router. The length of the table increases the speed at which the router forwards packets.
Enhanced multicast (MulTIcast) support and streaming support (Flow-control). This has enabled the development of multimedia applications on the network to provide a good network platform for quality of service (QoS) control. Added support for Auto-configuraTIon. This is an improvement and extension of the DHCP protocol, making the management of the network (especially the local area network) more convenient and faster. With higher security, users can encrypt data at the network layer and verify IP packets when using an IPv6 network, which greatly enhances network security.
China's own ipv9, there are many problems
It is reported that the three major domestic operators have begun to promote the development of IPv6. Duan Xiaodong, deputy director of the Network Technology Research Institute of China Mobile Communications Research Institute, said on the 8th that it is recommended to force IPv6 to be supported when devices and terminals access the network. This is in line with the previous view that China Mobile said that "mobile terminals are not satisfactory for IPv6 support and need urgent support."
Zeng Gaofei said that from the perspective of China Mobile, the "marking" is still in the stage of paper talks, or underground, has not been officially announced, let alone approved.
For mobile TD terminals, there are still no commercial and IPv6-enabled terminals, and there are still big gaps in chip development. Zeng Gaofei said that China Mobile’s idea is very simple, requiring terminal enterprises to implement the use of technology and to put technology from foreign companies. And the accessories are taken back and placed in the terminal. This is how fast and good. However, it will add a large cost to the terminal.
In this way, Chinese enterprises are still hollowed out in this technology, and they still cannot escape the technical path of being human. Because the terminal will increase the cost, mobile phone manufacturers are not willing to develop related TD terminals supporting IPv6 for China Mobile. "This should be one of the reasons." The other two reasons are whether other terminal accessories are compatible with IPv6, and whether the actual use of IPv6 has a market. “China Mobile has to invest a lot of money to promote it.†It is difficult for enterprises to obtain high profits on the terminal. Therefore, it is also a problem for companies to lack the motivation to fund and thus not to help China Mobile.
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