The document provides an overview of Wi-Fi technology. It discusses how Wi-Fi works using radio waves to create wireless hotspots for connecting devices. It outlines the advantages of Wi-Fi like mobility, ease of installation, and flexibility. It also describes the various IEEE 802.11 wireless networking standards including 802.11b, 802.11a, and 802.11g. Finally, it discusses how Wi-Fi is used in applications like wireless networks and Wi-Fi phones and how to get faster Wi-Fi speeds.

1. Wi-Fi

2. PRESENTATION ON WI-FI
Presented by:

3. CONTENTS
• Introduction
• How Wi-Fi works
• Advantages
• The Wi-Fi Technology
• IEEE 802.11-Basic Information
• 802.11 protocol
• IEEE 802.11b , 802.11a & 802.11g
• Hotspot , Application of Wi-Fi & Wi-Fi Phone
• Conclusion

4. INTRODUCTION
• Wireless Technology is an alternative to wired Technolog
y, which is commonly used, for connecting devices in wir
eless mode.
• Wi-Fi (Wireless Fidelity) is a generic term that refers to
the IEEE 802.11 communications standard for Wireles
s Local Area Networks(WLANs).
• Wi-Fi Network connect computers
to each other, to the internet and
to the wired network.

5. How Wi-Fi works
WiFi is a technology that uses radio waves to provide
network connectivity. A WiFi connection is established
using a wireless adapter to create hotspots - areas in the
vicinity of a wireless router that are connected to the
network and allow users to access internet services. Once
configured, WiFi provides wireless connectivity to your
devices by emitting frequencies between 2.4GHz - 5GHz,
based on the amount of data on the network.

6. ADVANTAGES
• Mobility
• Ease of installation
• Flexibility
• Cost
• Reliability
• Security
• speed

7. The Wi-Fi Technology
Wi-Fi Networks use Radio Technologies to transmit &
receive data at high speed :
IEEE 802.11b
IEEE 802.11a
IEEE 802.11g

8. IEEE 802.11-Basic Information
• This is a set of media access control (MAC) and
physical layer specifications for Wireless Local Area
Network (WLAN).
• This is created and maintained by Institute of
Electrical and Electronics Engineers (IEEE) LAN/
MAN Standard Committee (IEEE 802) .

9. 802.11 protocol
• <1> 802.11-1997
• <2> 802.11 a
• <3> 802.11 b
• <4> 802.11 g
• <5> 802.11 n
• <6> 802.11 ac
• <7> 802.11 ad
• <8> 802.11 ah
• <9> 802.11 aj
• <10> 802.11 ax
• <11> 802.11 ay

10. IEEE 802.11b
• Appear in late 1999
• Operates at 2.4GHz radio spectrum
• 11 Mbps (theoretical speed)-within 30 m range
• 4-6 Mbps (actual speed)
• 100-150 feet range
• Most popular , Least Expensive
• Interference from mobile phones &
Bluetooth device which can reduce
the transmission speed.

11. IEEE 802.11a
• Introduced in 2001
• Operates at 5Ghz (less popular)
• 54 Mbps (theoretical speed)
• 15-20 Mbps (Actual speed)
• 50-75 feet range
• More expensive
• Not compatible with 802.11b

12. HOTSPOTS
• A Hotspot is a geographical a
rea that has a readily ac
cessible wireless network
 Hotspots are
equipped with
Broadband Internet
connection and one or
more access points.

13.  Many electronic devices
use Wi-Fi due to its
simple functions.
 Companies use Wi-Fi to
create wireless networks
within their company.
 Phone companies use
Wi-Fi Hotspots for their
users to get free
calling/internet access.

14. Wi-Fi Phone
• A Wi-Fi phone is a wireless
device that gives the
benefit of wireless
connectivity .
• From this angle , Wi-Fi
phone looks like the next
big thing in the telecom
revolution .

15. How to get faster Wi-Fi
• 3X SPEED – From the Leader in WiFi
• 802.11ac and 802.11ad WiFi technology give you the fas
test WiFi speeds up to 3x faster than your old router. Pre
pare for the future- upgrade your home network today to
get the most out of your new devices and optimize the p
erformance of your current devices. Works with all your c
urrent WiFi devices-11 a/b/g/n.

16. Conclusion
• Wi-Fi is a simple way to connect to the internet ,
without the need to physically connecting wires.
• Hotspot is a geographical area setup in any public
location , and has a readily accessible wireless
network .
• Security is a huge challenge for Wi-Fi Networks, many
Security techniques are used to improve it.

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