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Internet Protocol Address: This number is an exclusive number all information technology devices, printers, routers, modems, etc, use which identifies and allows them the ability to communicate with each other on a computer network.

Each and every individual internet connection (to the external) has a unique IP. Every individual network connection (to the internal / local network) has a unique IP only within that particular network.

There is a standard of communication which is called an Internet Protocol standard (IP).