What is ipv4, ipv6, ipv9? ipv4 and ipv6 is the current protocol used by the global Internet is TCP /IP protocol, that is, IPv4 address bits are 32 bits, that is Up to 2 32-bit computers can be connected to the Internet at the same time. Due to the booming Internet, the demand for IP addresses has become more and more important for more than a decade, making the IP address more strict. Just follow the system home Xiaobian to learn ipv4, ipv6, ipv9 related knowledge.
ipv4, ipv6 resources have been exhausted
the data show that the global IPv4 address might all finished 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
come to talk about ipv9, a few years back, there was the name of safeguarding China's sovereignty IPv9 network technology (otherwise known as decimal networks) are now silent, their original invention Xie Jianping, the decimal network standard working group and its academic team have always refused to disclose the technical details about IPv9 on the grounds of "trade secrets". Recently, ipv9 has appeared some domestic friends, saying that it is ipv9, simple can understand this The biggest feature of IPv9 is the use of decimal numbers for URL encoding. This means that users can enter a simple digital domain name such as "12345" to replace a domain name like "www.abc.com".
IPv6 and IPv4 What are the characteristics and advantages compared to?
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, IPv6 address allocation follows the principle of aggregation (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 support and flow-control support. This has enabled the development of multimedia applications on the network to provide a good network platform for quality of service (QoS) control. It has added support for Auto-configuration. This is an improvement and extension of the DHCP protocol, which makes the management of the network (especially the local area network) more convenient and faster. Higher security. In the IPv6 network, users can encrypt the data of the network layer and perform IP packets. calibration, which greatly enhances network security.
China's own ipv9, there is the problem of multi
it is reported that the three major domestic carriers 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."
has expressed fly, moving from stand point of view, "Standard" is still in the drawing board stage, or underground status, has not officially announced, let alone recognized.
for the TD mobile terminal as yet no commercially available support issues and there is a big gap in the terminal, chip development and other IPv6, has expressed fly, to move the idea is simple, requiring enterprises to implement end ism, Bring the technology and accessories back from the hands of foreign companies and put them in the terminal. This is how fast and good. However, it will add a large cost to the terminal.
this way, also caused Chinese enterprises in this piece of technology hollow, still could not escape the old technology controlled by others. 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.