The ipv6 address is composed of 128-bit binary numbers. IPv6 addresses are binary numbers represented in hexadecimal and have a 128-bit address length. An IPv6 IP address consists of 8 address sections, each section contains 16 address bits, and the total length is 16x8=128 bits.
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The number of binary digits in an IPv6 address is 128 bits.
IP is the abbreviation of Internet Protocol. IP addresses are generated according to the rules of the IP protocol. IP addresses are the addresses of terminals such as mobile phones and computers on the Internet. They are the unique identities of terminals in cyberspace. logo.
IPv6 is the abbreviation of Internet Protocol Version 6. It is the next generation IP protocol designed by the Internet Engineering Task Force (IETF) to replace IPv4. Its number of addresses is said to be the largest in the world. Every grain of sand in the world is encoded with an address.
IPv6 is a globally recognized next-generation Internet commercial application solution. It is a next-generation Internet protocol version developed by the International Organization for Standardization IETF to solve the exhaustion of IPv4 addresses. It can provide massive network address resources and broad space for innovation. .
The biggest problem of IPv4 is the insufficient 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.
The IPv6 address length is 128 bits, which is 4 times the IPv4 address length. An IPv6 IP address consists of 8 address sections, each section contains 16 address bits, and the total length is 16x8=128 bits.
So the IPv4 dotted decimal format is no longer applicable and is expressed in hexadecimal.
IPv6 has 3 representation methods:
1. Hexadecimal representation
The format is X:X:X:X:X:X:X:X, where each X represents 16b in the address, expressed in hexadecimal, for example:
ABCD:EF01: 2345:6789:ABCD:EF01:2345:6789
In this notation, the leading 0 of each X can be omitted, for example:
2001:0DB8:0000:0023: 0008:0800:200C:417A→ 2001:DB8:0:23:8:800:200C:417A
2. 0-bit compressed representation
in a certain In some cases, an IPv6 address may contain a long period of 0s, and the continuous period of 0s can be compressed into "::". However, to ensure the uniqueness of address resolution, "::" can only appear once in the address, for example:
FF01:0:0:0:0:0:0:1101 → FF01::1101
0:0:0:0:0:0:0:1 → ::1
0:0:0:0:0:0:0:0 → ::
3. Embedded IPv4 address representation
In order to achieve IPv4-IPv6 interoperability, the IPv4 address will be embedded in the IPv6 address. At this time, the address is often expressed as: X:X:X ::X: Typical example, note that in the first 96b, the method of compressing 0 bits is still applicable
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