What is the difference between public and private networks? What CIDR blocks are used for private networks?

Public networks are networks accessible from the internet, with unique IP addresses that are routed in the global network. Private networks are used within an organization or local infrastructure, are not directly visible from the internet, and are usually protected by NAT (Network Address Translation).

Special CIDR blocks are designated for private networks, which are not routed on the internet:

• 10.0.0.0/8 (from 10.0.0.0 to 10.255.255.255)
• 172.16.0.0/12 (from 172.16.0.0 to 172.31.255.255)
• 192.168.0.0/16 (from 192.168.0.0 to 192.168.255.255)

These ranges are used for organizing local networks to avoid conflicts with public IP addresses.