How Does Wi-Fi Work?

A simple explanation of how wi-fi work?

Phone / Laptop
      ↓  Wi-Fi
  Access Point
      ↓
     Router
      ↓
   Internet

What Is Wi-Fi?

Wi-Fi is a family of wireless LAN technologies based on IEEE 802.11 standards. Devices use radio signals to communicate with an access point.

What Does an Access Point Do?

An access point provides wireless network access to client devices. It can also connect the wireless network to a wired LAN.

How Does a Wi-Fi Radio Signal Carry Data?

Wi-Fi encodes information onto radio signals. Channel width, modulation, signal quality and interference affect the connection.

How Does a Device Connect to Wi-Fi?

A device discovers available networks, chooses an access point and completes the required connection and security steps before normal data transfer begins.

Why Does Wi-Fi Speed Change?

Distance, walls, interference, channel congestion, device capability and signal quality can all change the real-world speed.

Quick Takeaway

The main idea is simple: the device receives information, processes it using its hardware and controller or processor, and then stores, sends or displays the result. The exact details depend on the technology.

FAQ

Is this technology difficult to understand?

No. Once you understand the main parts and the flow of data, the basic working becomes much easier to follow.

Does real-world performance always match the specification?

Not always. Real performance can depend on the hardware, software, interface, workload and environment.