Private ipv4 address

Ipv4 private address ipv4 address, which has four 8-bit binary numbers. For convenience, it is often expressed in decimal number. The range of 8-bit binary is 0-255. In this way, there can be a total addressing range of 4 GB. There are three private IP address ranges: A: 10.0.0.0 ~ 10.20.255.255/8 B: 172.16.0.0 ~ 172.31.255.255/12 C: 192.168.0.0 ~ The number following 192.168.255.255/16 is the subnet mask (for example,/8. The first eight digits indicate the network address, and the second 32-8 = 24 digits indicate the host address ). Such private addresses can be used in A company or A group's lan. For example, A represents A private address, which has about 16 million of the address space and is suitable for ultra-large companies or groups; B Represents the private address, which has about 1 million address space and is suitable for large companies or groups. C Represents the private address, with more than 30 thousand address space, it can be used by small and medium-sized enterprises or groups.