Shulou(Shulou.com)06/01 Report--

We often hear people say that IPV4 addresses are not enough and that IPV6 addresses should be used. IPV6 addresses have so many advantages, but why is it still not popular?

The address length of 1 IPV6 is 128bits, while that of IPV4 is only 32 bits. IPV6 has a great advantage in the spatial distribution of addresses.

2 IPV6 has a smaller routing table, and the address of IPV6 follows the principle of clustering from the beginning of assignment, which enables the router to represent a subnet with a record in the routing table, which greatly reduces the length of the routing table in the router and improves the speed of forwarding packets.

(3) enhanced multicast support and convection control. This makes the multimedia application on the network have a great opportunity for development, and provides a good network platform for QOS control of quality of service.

4 added support for automatic configuration, which is an improvement and extension of DHCP protocol, which makes the management of the network (especially the local area network) more convenient and fast.

5 higher security, users in the IPV6 network can encrypt the data of the network layer and verify IP messages, which greatly enhances the security of the network.

The advantage of IPV6 is so obvious, but why is it still not popular now?

1 IPV6 is not backward compatible with IPV4, which means that network and website operators must upgrade their network equipment and software to support IPV6, but so far, most operators are reluctant to do so, wasting costs and causing unnecessary losses

2 time delay, users / enterprises are waiting for content providers to deploy IPV6, while content providers are waiting for users / enterprises to deploy IPV6

3 if the network operators themselves do not break away from the IPv4-based Internet, then they will not transition to IPv6. Instead, they will have to go through a dual-stack configuration or use NAT devices to bridge both protocols to run IPv6 and IPv4 at the same time

4 but the current situation is that there are not so many resources to build a tunnel between both sides.

6 the widespread use of NAT technology also slows down the popularity of IPV6.

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