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How Domain Name System (DNS) Works

Part 1: Basic Concept of Networking

From our other tutorial of "The Structure of IP Address", we know that every computer (node) that connect with the Internet has an unique network address. We usually called this unique network address the IP Address.

When your computer connect with the Internet, your computer will also assign an unique IP address.

This is very important to understand that all computers on the Internet are communicating with each other by IP addresses, as shown in the diagram below:

TCP-IP networking

However human being would like to use name (domain name) rather than number (IP address). This is much more friendly and much easier to remember. Therefore we will use names to represent the computers on the Internet as shown in the following diagram.

DNS naming system

Isn't it much more friendly and much easier to remember?

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