wifi technology

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THE INSTITUTE OF CHARTERED ACCOUNTANTS OF INDIA
BATCH NO. 63
FACULTY NAME Mr. Suraj Sharma
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Submitted by

• ROLL NO. 19 Onkar Singh Shekhawat
• Registration No. - Cro-0532484
• ROLL NO. 20 Pavan Kumar Mahawar
• Registration No. - Cro-0505602
• ROLL NO. 21 Sahadev Choudhary
• Registration No. - Cro-0534418

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WIFI TECHNOLOGY
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INDEX

• Intro to wifi
• Basic working of WIFI
  
• How WIFI works
• WIFI enabled devices
• IEEE 802.11 Standard
• Requirement of hardwares
• Area coverage by WIFI

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Intro to wifi

• Short for wireless fidelity.
• It is a wireless technology that uses radio
  frequency to transmit data through the air.
• Wi-Fi is based on the 802.11 standard
• 802.11a
• 802.11b
• 802.11g

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Basic working

• No Wiring system
• Radio Waves
• Two-way communication
• Computer Adapter
• Wireless Router

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HOW WIFI WORKS
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WIFI enabled devices

• Computer
• Laptop
• Smartphones
• Printers etc.

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IEEE 802.11 standard

• The IEEE 802.11 standard is a set of media access
  control (MAC) and physical layer (PHY)
  specifications for implementing wireless local
  area network (WLAN).
• They are created and maintained by
  the IEEE LAN/MAN Standards Committee (IEEE 802).
• The base version of the standard was released in
  1997.

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Requirement Of Hardwares To Connect To A WIFI
Network

• PCI Wi-fi Card
• USB Wireless Adapter
• Hub or Switch
• Wireless router
• Embedded systems

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An embedded RouterBoard 112 with U.FL-RSMA
pigtail and R52 mini PCI Wi-Fi card
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Wireless adapters can plug into a computer's PC
card slot or USB port.
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A wireless router uses an antenna to send signals
to wireless devices and a wire to send signals to
the Internet
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Area coverage by WIFI

• Wi-Fi technology is used to provide Internet
  access to devices that are within the range of
  a wireless network that is connected to the
  Internet.
• The coverage of one or more interconnected access
  points (hotspots) can extend from an area as
  small as a few rooms to as large as many square
  kilometres.

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Advantages

• Freedom You can work from any location that you
  can get a signal.
• Setup Cost No cabling required.
• Flexibility Quick and easy to setup in temp or
  permanent space.
• Mobile Access Can access the network on the
  move.

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Disadvantages

• Speed Slower than cable.
• Range Affected by various medium.
• Travels best through open space.
• Reduced by walls, glass, water, etc
• Security Greater exposure to risks.
• Unauthorized access.

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Basic Security Strategies

• Change the default network name in the access
  point.
• Change the default access point password.
• Center the access point in the middle of the
  building/house.

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HOW TO USE WIFI IN ANDROID OPERATING SYSTEM
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How to turn on/off wifi in Android Devices

• Open the Settings app.
• Turn on WIFI radio .

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How to Connect to a WIFI network

• After turning on WIFI you see a list of networks
  .
• Choose any one from the list and
• Tap connect .
• If using a secured network then
• Provide proper password.
• Now Enjoy Browse Internet

connect
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Sharing of Data connection in Smartphones
(Tethering)

• Tethering is when you turn your smartphone into a
  mobile Wi-Fi hotspot and share your phones 3G/4G
  data connection.
• Once you've turned tethering on,
• any device with a wireless connection can connect
  to the internet via your smartphone's connection.

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What is Next?

• Now, the focus in wireless is shifting to wide
  area, i.e., WiMax and LIFI
• WiMax short for Worldwide Interoperability for
  Microwave Access.
• it is defined in IEEE 802.16 standards.
• It is designed to deliver a metro area broadband
  wireless access (BWA) service, and is being
  promoted by the WiMax Forum.
• WiMAX is quite similar to WiFi, but on a much
  larger scale and at faster speeds. 

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Intro to Lifi technology

• LiFi is a wireless optical networking technology
  ,
• that uses light-emitting diodes (LEDs) for data
  transmission.
•  LiFi is designed to use LED light bulbs similar
  to those currently in use in many
  energy-conscious homes and offices.
• Picture PICTURE

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WIFI Summary

• WiFi is a freedom freedom from wires.
• It allows you to connect to the Internet from
  just about anywhere a coffee shop, a hotel
  room, or a conference room at work.
• it is almost 10 times faster than a regular
  dial-up connection.

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