Who knows IP4 IP6 IP9 this technology

China uses IPv4, but IPv6 was developed by the Chinese themselves, and now it's being tried in a small area

As for v9, you don't need to understand this, no matter what we do

IPv6 is an abbreviation for "Internet Protocol Version 6", which is a next-generation IP protocol designed by IETF (not China) to replace the current version of the IP protocol - IPv4. IPv6 uses an IP address with a length of 128 bits, while IPv4 has only 32 bits, so IPv6 has much richer address resources than IPv4. In addition, IPv6 also adopts many technologies such as hierarchical address mode, efficient IP headers, quality of service, automatic configuration of host addresses, authentication and encryption.

IPv9 I don't know.

There are five differences between IPv4 and IPv6:

First, the routing and addressing capabilities have been expanded.

IPv6 increases the number of IP addresses from 32 bits to 128 bits, thus enabling a larger address space, with an estimated 4*10 18 IPv6 addresses per square meter of the earth's surface, so that IP addresses will not run out in the foreseeable future. IPv6 addresses are encoded in a hierarchical hierarchy similar to CIDR, like ** numbers. Routing is simplified and accelerated.

A "range" field is added to the multipoint propagation address, so that multipoint propagation is not only limited to subnets, but can span different subnets and different LANs.

2. Simplification of the format of the jujube header.

Some redundant domains in the IPv 4 header format are either dropped or listed as extended headers, reducing the overhead of packet processing and header bandwidth. Although IPv6 addresses are 4 times larger than IPv4 addresses. But the header is only twice as big.

3. Greater support for options.

IPv6 options are not placed in the headers, but in separate extension headers. If you don't specify the router, it won't open the processing extension headerThis dramatically changes routing performance.

IPv6 relaxes the strict requirements for the length of options (IPv4 can be up to 40 bytes in total) and new options can be introduced at any time as needed.

Many of the new features of IPv6 are available as options, such as support for IP Layer Security (IPSEC), support for Jumbograms, and IP layer roaming.

mobile-ip).

Fourth, the function of QoS.

The Internet can not only provide a variety of information, but also shorten people's distance

Online entertainment is also available. Online VOD is now being hyped by businesses, and most of them still guess that Brother Yan is only a quasi-VOD level, and can only be realized on the local area network, and the VOD on the Internet is not ideal.

The problem is that the IPv4 header has a field for service type, which is actually ignored in current router implementations. In the header of IPv6, there are two corresponding priorities and.

A stream identity field that allows datagrams to be designated as part of a flow of information and allows flow control to be performed on those datagrams.

For example, for real-time communication, even if all packets are lost, it is necessary to maintain a constant speed, so the priority is the most.

high, and a news grouping doesn't feel like it's delayed by a few seconds, so it has a lower priority. IPv6 specifies that these two fields are mandatory for every IPv6 node.

5. Identity Verification and Confidentiality.

IPv6 has included content on authentication, data consistency, and confidentiality. IPv6 is the next generation of the Internet, professional can search for it yourself or find a book of "Computer Network Basics" to read. IPv6 can provide more IP and higher bandwidth than the current IPv4, which can basically solve the problem of lack of IP resources.

IPv6 has a much larger address space than IPv4. This is because IPv6 uses a 128-bit address, while IPv4 only uses 32-bit.

IPv6 binary is 128 bits in length, in groups of 16 bits, each with a colon":"Spaced apart, it can be divided into 8 groups, each represented in a 4-digit hexadecimal format. For example:

2001:0db8:85a3:

08d3:1319:8a2e:

IP4 addresses are not enough, IP6 is added.

IPv4 specifies that the IP address length is 32, i.e. there are 2 32-1 addresses, and IPv6 the IP address length is 128, i.e., there are 2 128-1 addresses.

IPv6 increases the number of IP addresses from 32 to 128 bits, allowing for larger address spaces.

IPv6 addresses are encoded in a hierarchical hierarchy similar to CIDR, simplifying and speeding up routing.

Extended Materials. IPv4 is the fourth version of the Internet Protocol (IP) and the first widely used protocol that forms the basis of today's Internet technology. In 1981, Jon Postel defined IP in RFC791, IPv4 can run on a variety of underlying networks, such as end-to-end serial data links (PPP protocol and SLIP protocol), satellite links, etc. The most commonly used in local area networks is Ethernet.

IPv4 specifies that the IP address length is 32, that is, there are 2 32-1 addresses; The length of the IP address in IPv6 is 128, i.e. there are 2 128-1 addresses. IPv6 increases the number of IP addresses from 32 to 128 bits, allowing for larger address spaces.

Hope it helps you and adopts.

IP4 is all numbers, for example, and IP6 has numbers and letters, for example, it is likely that IP will not be enough in the future, then there will only be IP8 or 10, distinguish uppercase and lowercase letters, and increase the number of digits.

1. The difference between protocol addresses.

1) Address length.

The IPv4 protocol has a 32-bit (4-byte) address length; The IPv6 protocol has a 128-bit (16-byte) address length.

2) The representation of the address.

An IPv4 address is a binary number expressed as a decimal. IPv6 addresses are binary numbers expressed in hexadecimal system.

3) Address configuration.

IPv4 addresses can be configured manually or DHCP.

The IPv4 protocol requires Stateless Address Auto-Configuration (SLAAC) using Internet Control Message Protocol version 6 (ICMPV6) or DHCPV6.

2. The difference between data packets.

1) The size of the package.

IPv4 packets require 576 bytes, and fragmentation is optional. IPv6 packets require 1280 bytes and will not be fragmented.

2) Baotou.

The IPv4 protocol's packet header is 20 bytes long, does not recognize the packet flow for QoS processing, contains checksum, and contains an option field of up to 40 bytes.

The length of the IPv6 packet header is 40 bytes, which contains the flow label field of the packet flow that specifies QoS processing, but does not contain checksum. The IPv6 protocol does not have a field, but the IPv6 extension header is available.