What is a private address?

1. Class a ip Address

A Class a ip address consists of a 1-byte network address and a 3-byte host address. The maximum network address must be "0" and the address range is from 1.0.0.0 to 126.0.0.0. There are 126 available class A networks, each of which can accommodate more than 0.1 billion hosts.

2. Class B IP Address

A Class B IP address consists of two bytes of network address and two bytes of host address. The highest bit of network address must be "10" and the address range is from 128.0.0.0 to 191.20.255. There are 16382 available class B networks, each of which can accommodate more than 60 thousand hosts.

3. Class c ip Address

A Class c ip address consists of a 3-byte network address and a 1-byte host address. The maximum network address must be 110 ". The range is from 192.0.0.0 to 223.20.255. A Class C network can contain more than 2.09 million hosts, and each network can accommodate 254 hosts.

4. Class D addresses are used for multicast ).

The first byte of A Class d ip address starts with "lll0". It is a reserved address. It does not point to a specific network. Currently, this type of address is used in multi-point broadcast (Multicast. A multicast address is used to address a group of computers at a time. It identifies a group of computers that share the same protocol.

5. Class e ip Address

It starts with "llll0" and is reserved for future use.

The full zero ("0.0.0.0") Address corresponds to the current host. The IP address ("255.255.255.255.255") of "1" is the broadcast address of the current subnet.

In the three main types of IP addresses, each of the three regions is reserved as private addresses. The address ranges are as follows:

Class A address: 10.0.0.0 ~ 10.20.255.255

Class B address: 172.16.0.0 ~ 172.31.255.255

Class C address: 192.168.0.0 ~ 192.168.255.255