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1. Wi-Fi
Technology
By : Raja Krishna
Harish Varma

2. OUTLINES
What is Wi-Fi ?
Hotspots
How a Wi-Fi Network Works
Advantages and Limitations of Wi-Fi

3. What is Wi-Fi?
 WiFi ,short for Wireless Fidelity, is the term used to
describe high speed wireless connection over short
distances between mobile computing devices such as
laptops and the internet.
 Allows you to access the Internet while on the move ; you
can remain online while moving from one area to another,
without a disconnection or loss in coverage.

4. How a Wi-Fi Network Works?
• Basic concept is same as Walkie talkies.
• A Wi-Fi hotspot is created by installing an access point to an
internet connection.
• An access point acts as a base station.
• When Wi-Fi enabled device encounters a hotspot the device can
then connect to that network wirelessly.
• A single access point can support up to 30 users and can
function within a range of 100 – 150 feet indoors and up to 300
feet outdoors.
• Many access points can be connected to each other via Ethernet
cables to create a single large network.

5. HOTSPOT
 What is Hotspot ?
 A Hotspot is any location where Wi-Fi network access is
made publicly available.
 Hotspots are equipped with a Broadband Internet
connection, and one or more Access Points that allow
users to access the Internet wirelessly.
 Hotspots can be setup in any public location that can
support an Internet connection. All the locations discussed
below are examples of Hotspots.

6. Wi-Fi Hotspot Locations
 Airports
 Hotels & Resorts
 Restaurants
 Coffee Shops
 Bookstores
 Shopping Malls
 There are several online services allow you find hotspot
locations.

7. Hotspot Revolution

8. Advantages of Wi-Fi
• Mobility
• Ease of Installation
• Flexibility
• Cost
• Reliability
• Security
• Use unlicensed part of the radio spectrum
• Roaming
• Speed

9. Limitations of Wi-Fi
 Speed – Slower than cable
 Range – Affected by various medium
 Travels best through open space
 Reduced by walls, glass, water, etc
 High power consumption
 Data security risks

10. Thank You