What are the Public and Private IP addresses?

Question

I’ve been diving into the public and private IP addresses, as I could understand public IP addresses are assigned by Internet Service Providers, but I couldn’t understand how and by whom are private IP addresses assigned. I couldn’t understand as well what’s the purpose of private IP addresses.

Any help is appreciated. Thank you for helping me out.

In: Other

Answer 1

I ELI5 it

Think of public IPs as house addresses and private IPs as room numbers.

There can only be one Fantasy Street 111 which is assigned by some authority.

But the house/hotel can number their rooms as they like. It doses not matter if 1000 different hotels have room number 12.