IPV6 knowledge Summary

1. IPv6 knowledge abstract IPv6 addresses are all 128 bits in length. Each 16 bits is a dual-byte, which is represented in decimal format from 0 to 65535. 2. IPv6 address classification and Representation Method IPv6 is divided into unicast addresses (unicast), anycast, and multicast according to transmission types. The representation is as follows: a. Colon separation, for example, x: x. x indicates the hexadecimal number, and the value ranges from 0x0000-0xFFFF. Example: FB21: 1233: 55B2: AA44: 12B8: 6761: 890F: AB31. B. In the same 0 compression form, if two or more consecutive 0 values appear in the address, the compression representation can be used: (double colon), but only once, if two or more double colons exist, the actual address cannot be identified technically, for example, FB21: 0: 0: 0: 12B8: 6761: 0: 0, it can be expressed as FB21: 12B8: 6761: 0: 0, or FB21: 0: 0: 0: 12B8: 6761:. It cannot be expressed as FB21: 12B8: 6761: :. If the 8 segment values are all 0, they can be expressed. C. hybrid form, used to combine IPv4 and IPv6 addresses, x: d. d. d. d. The first six segments represent the IPv6 High-order bit, and the last four segments represent IPv4 addresses. Author: hongchangfirst