2. INTRODUCTION
• Wi-Fi stands for Wireless Local Area Network;
• Wi-Fi is a popular technology to exchange data or connect
to the internet wirelessly.
• This technology uses radio wave frequency for transmiting
data from sender to receiver.
• The Wi-Fi devices are been certified by Wi-Fi alliance on
the basis of standards drafted by IEEE’s(Institute of
electrical and electronic Engineers).
• Wi-Fi mainly works on physical and data link layer.

3. HISTORY
• In 1991 NCR corporation created the first wireless
product used for cashier system.
• In 1996 Australian radio-astronomer john O’sullivan
built a fast chip to transmit radio wave.
• IEEE’s created first WLAN standards which was named
as 802.11.
• In 1985 US Federal Communication commission
first released ISM band for unlicensed use

4. COMPONENTS FOR Wi-Fi SETUP
• Internet service provider(ISP)
• Antenna with transceiver in unguided and
cables in guided
• Router
• Range extender
• Access point
• Bridge
• Wi-Fi Switch
• Wi-Fi network adapter

5. WORKING OF Wi-Fi
• The typical Wi-Fi working consist of Access points
(AP) which broadcasts its SSID (service set identifier ).
• Wireless adapter of your devices transmit the data to the
AP.
• Data exchange between two network takes place in
physical layer

6. SECURITY
• WAP2 (Wi-Fi protected access version 2) is the
recommended standard now a days.
• It uses Advanced Encryption Standard i.e. CCMP
with 256 bit key.
• Initially we had WAP which used 128 bit key
encryption (temporal key integrity protocol) .
• MAC (Media Access Control) address filtration of
device done at data link layer for protection purpose.
• Firewall is also used to protect network from
uninvited user at the access point.

7. AUTHENTICATION
• Authentication server is used
• Username and password
• Establishing a encrypted channel before sending
username and password.
• User authentication performed at Application layer.
• It blocks an uninvited user from getting access to once
personal network.

9. MUMBAI a FREE Wi-Fi SPOT IN FUTURE
• A 50cr BMC project on paper since 2years is yet to
start its journey in Mumbai.
• Cable thief and security aspects are major obstacles
for this project.
• Project will establish towers throughout Mumbai.
• Towers will act as hotspot for user.
• Tower will be providing a range up to 1 or 2 Km.

10. ADVANTAGES
• No wires required for physical connection
• Easy setup and installation process
• more number of user to a single connection
• It allows mobility
DISADVANTAGES
• Limited range
• Data security risks
• Generate radiations
• High power consumption

11. CONCLUSION
• Wi-Fi is a simple, cost-effective way to connect to
the internet.
• IEEE drafted the 802.11 standard for wireless local
area networking.
• Access points which provide readily accessible
wireless network to user.
• Security is a huge challenge for Wi-Fi networks,
many techniques are used to improve it