How Computer Networks Work: A Simple Guide

Understand IP addresses, routers, DNS, and how your devices connect to each other.

At a Glance

What is a network

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A network is two or more devices connected to share information. Your home Wi-Fi is a local network. The internet is a massive network connecting billions of devices worldwide.

IP addresses

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Every device has an IP address — like a street address for your computer. Your router has a public IP (visible to the internet) and assigns private IPs to each device in your home (like 192.168.1.5).

What your router does

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Your router is the traffic cop. It receives internet from your provider (modem), then distributes it to all your devices via Wi-Fi or Ethernet cables. It also acts as a firewall.

What is DNS

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DNS (Domain Name System) translates website names into IP addresses. When you type "google.com," DNS finds the actual server address (like 142.250.80.46). Think of it as the internet's phone book.

Wired vs wireless

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Ethernet cables provide the fastest, most reliable connection. Wi-Fi is convenient but slower. For gaming or video calls, consider running an Ethernet cable to your device if possible.

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