What are the number of digits in an ipv4 address and an ipv6 address?

IPv6 is the next-generation IP protocol designed by the IETF (Internet Engineering Task Force) to replace the current version of the IP protocol (IPv4). It claims to be able to program every grain of sand in the world. Previous URL. The biggest problem of IPv4 is the limited network address resources, which seriously restricts the application and development of the Internet. The use of IPv6 can not only solve the problem of the number of network address resources, but also solve the obstacles for multiple access devices to connect to the Internet.

Related recommendations: "php Basic Tutorial"

Compared with IPV4, IPV6 has the following advantages:

1.IPv6 has greater address space. IPv4 stipulates that the length of an IP address is 32, and the maximum number of addresses is 2^32; while the length of an IP address in IPv6 is 128, that is, the maximum number of addresses is 2^128. Compared with the 32-bit address space, its address space increases by 2^128-2^32.

2.IPv6 uses a smaller routing table. IPv6 address allocation follows the principle of aggregation from the beginning, which allows the router to use one record (Entry) in the routing table to represent a subnet, which greatly reduces the length of the routing table in the router and improves the forwarding efficiency of the router. Packet speed.

3.IPv6 adds enhanced multicast (Multicast) support and flow control (Flow Control), which gives multimedia applications on the network significant development opportunities and improves quality of service (QoS, Quality of Service). Service) control provides a good network platform.

4.IPv6 adds support for automatic configuration (Auto Configuration). This is an improvement and extension to the DHCP protocol, making the management of the network (especially the LAN) more convenient and faster.

5.IPv6 has higher security. In IPv6 networks, users can encrypt network layer data and verify IP messages. The encryption and authentication options in IPv6 provide packet confidentiality and integrity. Greatly enhances network security.

6. Allow expansion. IPv6 allows the protocol to be expanded if new technologies or applications require it.

7. Better header format. IPv6 uses a new header format with options separate from the base header, with options inserted between the base header and the upper layer data if needed. This simplifies and speeds up the routing process because most options do not need to be selected by the router.

8. New options. IPv6 has some new options to implement additional functionality.

The above is the detailed content of What are the number of digits in an ipv4 address and an ipv6 address?. For more information, please follow other related articles on the PHP Chinese website!