[Original: http://www.donews.com/donews/Article/6/61101.html]
On March 19, 2004, almost all newspapers were published in this news: China's first next-generation Internet main network -Cernet2 test network using IPv6 protocols in Beijing, marking the next generation of Internet construction Fully launched, also marked a place in China's next-generation Internet research and construction. Since then, the name of IPv6 has become one of the most favored new stars in the media industry. "The IPv6 era has arrived", "next-generation Internet: This time, let us catch up", such as this kind of words are endless, "IPv6 concept stock madness "IPv6 seems to be a magical stick, and many media wavles it describes the beautiful scenes of next-generation digital life. So what is IPv6? Let us interpret IPv6 through its aura.
What is IPv6? IPv6 (Internet Protocol Version 6), full name is "Internet Protocol 6th Edition", simply it is just an Internet protocol, really remarkable is not IPv6 itself, but the next generation of Internet with IPv6 Mysterious function and magnificent prospects. The current Internet uses the TCP / IP protocol, one of the core protocols is the IP address encoding protocol. Existing Internet is running on the IPv4 protocol. IPv6 is the next version of the Internet protocol, or it is said to be the next generation of Internet protocols. Its biggest feature is to use 128-bit address length, which can generate 2 128 times = 3400000000000000000000000000000000 billion). (Oh, how many zero!) It is theoretically, the earth can be assigned to 67 million IP addresses per square meter on the earth. "There are" one address in the world "in some newspapers". In addition, it has two other advantages: faster - the next generation of Internet is at least 1000 times more than the current network transmission speed; safer. Speaking here, everyone is sent to it, it is not surprising.
Background generated by IPv6 With the rapid development of the Internet, the original IPv4 protocol has a significant limitations in many ways, such as end-to-end IP connection, quality of service (QoS), security, multicast, mobility, plug-and-play Wait, the most important question is that IP address can no longer meet. The IPv4 IP address uses a 32-bit address length, approximately 4 billion, but because the United States has mastered absolute control, the current IP address is facing depletion. IPv6 came out to life, October 1, 1996, 34 well-known universities in the United States launched a second-generation Internet project in Chicago --- Internet2. On October 10, the next May, the Clinton government has funded $ 100 million and launched the next generation of Internet action plans.
IPv6 Growth in China In April 1998, CERNET established the first IPv6 test network in my country, and established the first IPv6 test bed connected to the eight major cities in China and won China's first iPv6 address. In May 1999, CERNET officially accessed internationally provided IPv6 academic network 6ren. In March 2000, it was officially signed an interconnected agreement with the International Next Generation Internet. In the same year, China's first next-generation Internet exchange center was built in Tsinghua University. In October, CERNET first provides IPv6 address allocation services in China. In March 2004, my country's first next-generation Internet main network - China Education and Research Computer Network (CERNET2) Test Network opened and served in Beijing. As of December 2003, CERNET's main network has also accepted 36 provincial capitals in the country, including a national network center, 10 regional network centers, and 28 regional network main nodes. More than 1600 accesses, the number of networking hosts exceeds 2 million, with a number of users reached 12 million. Attachment: Xiao Knowledge: China's IPv6 Address: The currently allocated Stla is starting with 2001 ::, China CERNET is successful to the APNIC application address in April 2000, IPv6 address is: 2001: 250 :: / 35IPv6: will Sci-fi becomes a reality of CERNET2 based on IPv6 protocols will support new, richer, especially the current Internet can't provide a variety of applications, including high-definition, strong interactions to point video communications, intelligent transportation, environmental earthquake monitoring, remote Medical, distance education, etc. Experts predict that in the next generation of Internet age, the real digital life will come. Anyone can use any way in any way, any possible things will become part of the networked life, can be regulated through the network. . Li Xing, Professor, Tsinghua University, describes the scene in the next generation of internet environments: the pounds connected to the refrigerator are not allowed to open, and make a warning; the athletes wear the sensor, as the audience You can feel the competition as an athlete, such a incredible thing.
Let IPv6 go down the garden, the powerful function of IPv6 has laid a solid foundation for the next generation of Internet. In a fanatic voice, is it true for IPv6 from experiment to commercial, is it really not far? The development of computer technology has such a truth: only is compatible to get commercial promotion. In the face of existing huge IPv4 networks, it is a crucial problem with compatibility and smooth transition. International, IETF has built a special Working Group to handle this problem. From the current existing transition mechanisms, it is not possible to find a way to solve all problems. Because IPv4 conversion to IPv6 transformation involves so much, IPv4-based applications have been very mature, while IPv6-based applications are much less than. For more applications such as browsers, BBS, games, etc. have not yet or few of IPv6-based versions. Reproducing new programs can take a long time and a big price. For IPv6's biggest advantages: Endless address space, some people have discovered objections, according to industry experts estimated, do not consider the factors of most of the United States exclusively, count the number of existing IPv4 addresses, considering growing network users, IPv4 The address will also be at least 15 years! This will be exhausted in five to seven years in five to seven years, and IPv6 generated based on this point is insufficient. In addition, IPv6 solves the problem of address shortage, but its 128-bit address also brings a new problem than IPv4 original 32-bit, routing table data increases, will also greatly increase the requirements and cost of the router, and also Will spend the network bandwidth of the backbone network, which in turn directly affects the QoS of the network user. In terms of fiber high-speed transmission technology, optical exchange and intelligent optical network, broadband access, metro network technology, IP terminal, etc., IPv6 requirements are higher. Therefore, next-generation networks from the truly large-scale commercial investment, Liu Duo, Telecommunications Research Institute, Liu Du expert, also talked about Sina.com on April 2, 2004: "IPv4 and IPv6 coexistence is a long-term situation, we The current Internet is IPv4, and later is common rather than replacing, I don't know if I think, I feel very long. To make full use of existing IPv4 networks. "End: opportunities With the challenge of 1969, the United States started the first generation of Internet research. In 1994, the first national test network was first built in China's education and research computer network, which was several decades; in 1996, the United States introduced the next generation of Internet programs. In 1998, China experts began research work in this area. The gap is only two years, the next generation network, gave us an equal opportunity. The future society, the network is an important or even the most important element, which will have a decisive impact on social economy, science and technology education, and even national defense politics. If we lose the saying of the next generation of Internet, we will also It is largely subject to others. Therefore, developing and building the next generation of Internet, its significance is not self-satisfied. Fortunately, we seized this opportunity, CERNET2 has let us walk in the forefront of the world. Although IPv6 will encounter various difficulties, as long as the various departments and research institutions work together, IPv6 will be better tomorrow!
