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1. How Does Wi-Fi Work?

Lviv Polytechnic National University
How Does
Wi-Fi Work?
Presented by Andrii Sheremeta (KN-42)
Lviv 2025

2. Outline

• Introduction to Wi-Fi
• Frequency & Standards
• Security & Signal Strength
• Everyday Uses & Conclusion

3. Goal of the Report

• To explore Wi-Fi as a modern wireless communication
technology
• To focus on Wi-Fi as an advanced and accessible approach to
connect devices efficiently and support global connectivity
• To analyze the uses of Wi-Fi, its advantages and its limitations

4. What Is Wi-Fi?

• Wi-Fi lets devices connect to the internet without
wires
• It uses radio waves to send data
• Common in homes, schools and public spaces

5. The Invisible Connection

Wi-Fi works using radio signals we can’t see
These signals carry data between your device and a
router
Similar to how radio or TV signals travel through the air

6. The Role of the Router

The router is the heart of the Wi-Fi network
It connects to your internet provider through
a cable
Sends and receives radio waves to your
devices

7. How Data Travels

Your device → Router
→
Internet
Happens in fractions of a second
Data moves in tiny digital packets
→
Back to device

8. Frequency Bands

Wi-Fi uses 2.4 GHz and 5 GHz radio bands
2.4 GHz = slower but travels
farther
5 GHz = faster but shorter range

9. Wi-Fi Standards

Each version has a name like Wi-Fi 4, 5 or 6
Newer versions mean faster speeds and better stability
Standards are set by the IEEE

10. Keeping It Secure

• Use passwords to protect your network
• Encryption methods like WPA2/WPA3
keep data and connected users safe
• Avoid connecting to public Wi-Fi for
private tasks

11. What Affects Signal Strength

Walls and metal objects can block signals
Distance from router reduces speed
Other electronics can cause interference

12. Everyday Wi-Fi Uses

Connects phones, computers, TVs, and
smart devices
Supports streaming, gaming, and
online learning
Makes homes and cities smarter and
more connected

13. Conclusion: The Power of Wireless

Wi-Fi connects us without cables
It’s fast, convenient, and always evolving
The invisible network that powers our world

14.

Thank you for your attention!

15. References

• https://www.t-mobile.com/home-internet/the-signal/internet-devices/what-iswifi?utm_source=chatgpt.com
• https://www.geeksforgeeks.org/computer-networks/basics-of-wi-fi/?utm_source=chatgpt.com
• https://computer.howstuffworks.com/wireless-network.htm?utm_source=chatgpt.com
• https://images.google.com/
• https://uk.wikipedia.org/wiki/Wi-Fi/