IPv4 address depletion Google launches IPv6 Chinese search

Today, I have seen Google's imagination about the IPv6 age. Google has launched the IPv6 Chinese search page ipv6.google.cn.

Recently, people are increasingly concerned about the depletion of IPv4 addresses (Digital Coding for computer connection to the Internet), especially in China, India and other countries. Globally available IPv4 addresses are expected to be used up by the end of 2011. Although NAT (Network Address Translation) technology can delay this process, it makes the Internet structure more complex, creates obstacles to new applications, and is contrary to the public principles of the Internet.

IPv6-based Google English search can already be used in ipv6.google.com. Now Google Chinese search has enabled this function (your terminal needs an IPv6 connection to browse ). It is directly connected to China's next-generation Internet (CNGI), so it can provide Chinese search services for IPv6 users in China and the world. It allows any computer and mobile terminal to talk freely in the network (the "End-to-End" principle is the key principle originally designed by the internet). IPv6 will bring about the continuous development of the Internet, this makes continuous innovations in Internet applications possible.

The operating systems such as Windows Vista, Mac OS X, and Linux support IPv6 with high quality.

After talking about IPv6 for half a day, many friends may have heard of this word but do not know much about it. Next, let's take a look at IPv6 and its advantages.

IPv6 Overview

Currently, we use the second generation Internet IPv4 technology. The core technology belongs to the United States. Its biggest problem is that network address resources are limited. Theoretically, there are 4.3 billion IP addresses available for IPv4 technology, of which 3/4 and 3 billion are available in North America, the largest population in Asia is less than 0.4 billion, and China is more than, which is equivalent to the number of Massachusetts Institute of Technology in the United States. Insufficient addresses severely restrict the application and development of the Internet in China and other countries.

With the development of electronic technology and network technology, computer networks will enter people's daily life, and everything around them may need to be connected to the global Internet. However, IPv6, like IPv4, can waste a lot of IP addresses. To be precise, IPv6 networks do not have 2 ^-1 addresses that can be fully utilized. First, to achieve automatic IP address configuration, the subnet prefix used by the lan must be equal to 64, but few LAN can accommodate 2 ^ 64 network terminals. Second, because IPv6 Address Allocation must follow the clustering principle, address waste is inevitable.

However, if IPv4 only implements man-machine interaction, while IPv6 expands to the interaction between anything, it can not only serve humans, but also serve a large number of hardware devices, such as household appliances, sensors, remote cameras, and automobiles, it will be a real broadband network that is everywhere in every corner of the society. In addition, it will bring huge economic benefits.

Of course, IPv6 is not perfect and cannot solve all problems once and for all. IPv6 can only be continuously improved in development, nor can it occur overnight. The transition takes time and cost. However, in the long run, IPv6 is conducive to the sustained and long-term development of the Internet. At present, Internet organizations have decided to set up two specialized working groups to develop corresponding international standards.

IPv6 advantages

Compared with IPV4, IPV6 has the following advantages:

1. IPv6 has a larger address space. In IPv4, the specified IP address length is 32, that is, 2 ^ 32-1 (symbol ^ indicates power-up, the same below) addresses, while in IPv6, the IP address length is 128, there are 2 ^-1 addresses.

2. IPv6 uses a smaller route table. IPv6 Address Allocation follows the Aggregation principle from the beginning, which enables the router to express a subnet with an Entry in the route table, greatly reducing the length of the route table in the router, this improves the speed of router packet forwarding.

Iii. IPv6 has added enhanced Multicast support and Flow Control, which has given great opportunities for the development of multimedia applications on the network, it provides a good network platform for Quality of Service (QoS) control.

4. IPv6 supports Auto Configuration. This is an improvement and expansion of the DHCP protocol, making it easier and faster to manage the network (especially the LAN.

5. IPv6 provides higher security. In IPv6 networks, users can encrypt network-layer data and verify IP packets, greatly enhancing network security.

1. IPv6 technology and application prospects?
2. Communication between IPv6 and IPv4