Wi-Fi is a wireless networking technology that uses radio waves to provide wireless internet access. It allows devices to connect to a network wirelessly without needing cables. A Wi-Fi network uses wireless access points or routers to connect wireless devices to a wired network. Access points can provide internet access within their range to connected devices. While convenient, Wi-Fi networks have limitations such as a limited range, potential security issues, and signal interference between devices.

1. WIRELESS-FIDELITY
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2. BASIC KNOWLEDGE OF WI-FI
Wi-Fi stand for wireless Fidelity.
Wi-Fi is a mean of connecting
wireless devices to Each other in
order to exchange Data.
Wi-Fi is the of a wireless networking
Technology that uses radio waves to
provide high speed network and
internet connection.
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3. Waves
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4. MEANING OF WIRELESS
The Word wireless is Dictionary
defined as “having no wires”.
In Networking Terminology ,
wireless is the term used to
described any computer network
where there no Physical wire
Connection..
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between Sender and Receiver, But
rather the Network is connected by
radio Waves and or microwaves to
maintain Communication.
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6. WHAT IS WI-FI?
Wi-Fi is Actually a Brand Name for
a Set of Security and Hardware
function protocols which aim to help
Ensure that a Wi-Fi connectivity is
Secure And Easy to configure.
Established These approved
protocols Creates a Wi-Fi certified
Network, 6

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Which can Help connect Your
Business Data And Ensure a
Secure connection .
Wi-Fi brand means that your
products and their configure follow
hardware and security
requirements.
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8. MAIN AIM OF WI-FI
Eliminate cabling and wiring.
Eliminate Switches, plug, pins and
connectors.
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9. STANDARD OF WI-FI
802.11,
802.11b,
802.11a,
802.11g.
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10. 802.11 AND 802.11B STANDARD
802.11 standard only supported a
maximum network bandwidth of 2
mbps too for most application.
802.11a It support bandwidth up
to 11 mbps
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11. 802.11a STANDARD
It support bandwidth up to 54
mbps .
It fast maximum speed.
Highest cost
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12. HOW WI-FI WORKS?
A wireless access point(WAP)
connects a group of wireless
devices to an adjacent wired LAN.
Wireless adapters allow devices
to connect to a wireless network.
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Wireless routers integrate Wireless
Access Points.
A wireless router allows wired and
wireless Ethernet LAN devices to
connect to a single WAN device such
as a cable modem or a DSL modem.
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To connect to a Wi-Fi LAN, a
computer or device has to be
equipped with a wireless network
interface controller.
The combination of computer and
interface controller is called a
station.
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All station share a single radio
frequency communication channel.
Transmissions on this channel are
received by all station within range.
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17. INTERNET ACCESS
A Wi-Fi enabled device can connect
to the internet when within range of a
wireless network.
The coverage of one or more access
point called hotspots.
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Wi-Fi provides service in private homes,
streets, and independent businesses as
well as in public spaces.
Router that incorporate a DSL modem of a
cable modem and a Wi-Fi access point,
often set up in homes and other buildings,
provide internet access to all devices
connected to them.
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Now a day there is city wide Wi-
Fi, campus wide Wi-Fi that
provides a services to that areas.
Wi-Fi also allows a
communication directly from one
computer to another without an
access point intermediary called
ad hoc Wi-Fi transmission.
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The wireless ad hoc network mode
has proven popular with digital
cameras, game consoles and other
consumer electronics devices.
Some devices can also share their
internet connection using ad-hoc,
becoming hotspots or “virtual
routers”. 21

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23. RANGE
 Wi-Fi network have limited range. A typical wireless
access point using 802.11b or 802.11g with a stock
antenna might have a range of 32 m indoors and
95m outdoors.
 Range also varies with frequency band. Wi-Fi in the
2.4 GHz frequency block has slightly better range
than Wi-Fi in the 5 GHz frequency block which is
used by 802.11a and optionally by 802.11n.
 On wireless routers with detachable antennas, it is
possible to improve range by fitting upgraded
antennas which have higher gain in particular
directions.
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24. SECURITY
 In Wi-Fi The most common wireless
encryption-standard, Wired Equivalent
Privacy (WEP), has been shown to be easily
breakable.
 After that Wi-Fi Protected Access (WPA and
WPA2) encryption standards develop which
solve the security problem of WEP.
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25. ADVANTAGES
Wi-Fi allows cheaper deployment of LANs.
Also spaces where cables cannot be run,
such as outdoor areas and historical
buildings, can host wireless LANs.
Wi-Fi Protect Access encryption (WPA2) is
considered secure, provided a strong
passphrase is used.
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26. LIMITATION
 Wi-Fi connections can be disrupted or the
internet speed lowered by having other
devices in the same area.
 Wi-Fi is a wireless technology which can
only be used for limited geographical area.
 The major weakness of Wi-Fi is that it does
not allow clear and quality media streaming
because of weak signal transfer rate.
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28. SUMMARY
 Introduction of Wi-Fi..
 How it works..
 Internet Access..
 Security...
 Range...
 Advantages...
 Limitation...
 Video...
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29. THANK YOU…
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