This document provides an overview of Wi-Fi technology, including its purpose of enabling wireless access to applications and data to eliminate complex cabling. It describes the key elements of a Wi-Fi network including access points and Wi-Fi cards. It also discusses how Wi-Fi networks work, common topologies and configurations, applications, security measures, advantages and limitations, and innovations like Wi-Fi phones and cameras. The document concludes that Wi-Fi provides a cost-effective and flexible way to connect devices wirelessly, though security remains a challenge as networks grow in popularity.

1. Presented by:
Anil Pokhrel
BscCSIT 5th
sem
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2. Contents

Introduction

Need of Wi-Fi Technology

Purpose

Element of wifi network

How a Wi-Fi Network Works

Topologies & Configurations

Applications

Wi-Fi Security

Advantages & Limitations

Innovations

Conclusion
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3. Introduction

Wireless Technology is an alternative to Wired
Technology, which is commonly used, for connecting
devices in wireless mode.

Wi-Fi is a generic term that refers to the IEEE 802.11
communications standard for Wireless Local Area
Networks (WLANs).

Wi-Fi Network connect computers to each other, to the
internet and to the wired network.
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4. Need of Wi-Fi Technology

Rat’s Nest Of Wires
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5. 
Cables for Keyboard, Mouse, Power, etc.
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6. Freedom from wires!!
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7. Purpose

The purpose of Wi-Fi is to hide complexity by enabling
wireless access to applications and data, media and
streams.

The main aims of Wi-Fi are:
i. make access to information easier
ii. eliminate complex cabling
iii. eliminate switches, adapters, plugs, pins and connectors
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8. Elements of a WI-FI Network

Access Point (AP) - The AP is a wireless LAN transceiver
or “base station” that can connect one or many wireless
devices simultaneously to the Internet.

Wi-Fi cards - They accept the wireless signal and relay
information. They can be internal and external.(e.g
PCMCIA Card for Laptop and PCI Card for Desktop PC)

Safeguards - Firewalls and anti-virus software protect
networks from uninvited users and keep information
secure
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9. How a Wi-Fi Network Works
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10. Topologies & Configurations
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11. Peer-to-Peer topology
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12. Point to Multipoint bridge Topology
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13. Wi-Fi Configurations
Wi-Fi is composed of three main sectors:
I. Home (individual residences and apartment buildings)
II. Public (Round about 70,000 “hotspots” through out the
world)
III.Enterprise (corporations, universities, office parks)
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14. Applications
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15. Wi-Fi Security

Service Set Identifier (SSID)

Wired Equivalent Privacy (WEP)

Wireless Protected Access (WPA)
1)WEP and WPA are encryption protocols that you can
choose from in your router's firmware.
2)Wi-Fi Protected Access (WPA), a subset of the upcoming
802.11i security standard, will replace the flawed Wired
Equivalent Privacy (WEP).
3)Without your SSID, people will not be able to join your Wi-
Fi hotspot. 15

16. Advantages
Mobility
productivity
expandability
Cost
Security
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17. Limitations

security

Limited range

High power consumption

Speed
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18. Innovations…..
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19. WiFi Phone

A Wi-Fi phone is a
wireless device that gives
you the dual benefits of
wireless connectivity and
the cost savings of VoIP.
From this angle, Wi-Fi
phone looks like the next
big thing in the telecom
revolution.
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20. Wi-Fi Camera
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21. Conclusion

Wifi is the simple, cost-effective way to connect to the
internet, without the need of physically connecting wires

Security is the huge challenge for Wifi network

It is growing in popularity because of decreasing cost and
the freedom it gives to the users

Almost every device used these days are compatible to
wifi
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22. References

https://www.google.com/search?
client=ubuntu&channel=fs&q=wifi+technology+conclusio+
&ie=utf-8&oe=utf-8ss

https://computer.howstuffworks.com/wireless-network.htm

https://www.lynda.com/Hardware-tutorials/Up-Running-
Wireless-Networking/191089-2.html
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23. Thank
You 23