Private and Public IP Addresses

IP addresses can be classified into Private and Public IP addresses.

To preserve the IP address space, Private IP addresses were introduced. Private IP addresses are used on the internal network and are never advertised to the public network.

Private IP addresses range:

10.0.0.0 - 10.255.255.255
Total host addresses : 16,777,216

172.16.0.0 - 172.31.255.255
Total host addresses : 1,048,576

192.168.0.0 - 192.168.255.255
Total Host addresses : 65536

Private IP addresses go through a process of NATing if they want to communicate with public internet

Public IP addresses are those addresses which are advertised on the public network, inter-networks.