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Wi –fi


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Wi –fi

  1. 1. Wi –Fi Presented by : SANDARSH SETHI
  2. 2. Definition : <ul><li>Uses radio waves to provide Wireless High-speed Internet </li></ul><ul><li>Defines Wi-Fi as any &quot;Wireless Local Area Network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards.&quot; </li></ul>The name of a popular wireless networking
  3. 3. Trade mark:
  4. 4. <ul><li>Uses radio waves to send signals to various devices. </li></ul><ul><li>Convert the data into machine language </li></ul><ul><li>Allows data to be sent very quickly </li></ul>Working:
  5. 5. WiFi Hotspots: <ul><li>Physical location that offers internet access over a wireless LAN </li></ul><ul><li>Found in coffee shops, hotels, airports etc. </li></ul>                                                                                                                         
  6. 6. Types of hotspots: <ul><li>Free hotspots </li></ul><ul><li>Commercial hotspots </li></ul>
  7. 7. Free hotspots: <ul><li>Uses open public network </li></ul><ul><li>Wi-Fi router required </li></ul><ul><li>No control on router </li></ul>
  8. 8. Commercial hotspots: <ul><li>Monthly or yearly subscription required </li></ul><ul><li>Any mode of payment could be used </li></ul><ul><li>May allow free access to certain sites </li></ul><ul><li>Travel netcon, esperto wireless are commercial hotspot provider companies </li></ul>
  9. 9. Wi –Fi Reach: <ul><li>Wi-Fi networks have limited range. </li></ul><ul><li>Typical wireless router using 802.11b or 802.11g have a range of 32 m indoors and 95 m outdoors. </li></ul><ul><li>New IEEE 802.11n can exceed that range by more than double. </li></ul><ul><li>Wi-Fi in the 2.4 GHz frequency block has slightly better range than Wi-Fi in the 5 GHz frequency block. </li></ul>
  10. 10. Embedded systems: <ul><li>Uses both hardware & software components </li></ul><ul><li>Wi-Fi availability in the home is on the increase. </li></ul><ul><li>Increasingly used for remote monitoring including security systems </li></ul><ul><li>Also used in hospitals </li></ul>
  11. 11. Long Distance 802.11 Wi-Fi – dish :
  12. 12. Operational advantages of Wi-Fi: <ul><li>unmatched mobility & elasticity </li></ul><ul><li>can be expanded with growth </li></ul><ul><li>quick easy setup </li></ul><ul><li>lower total ownership cost </li></ul><ul><li>more faster & secure </li></ul>
  13. 13. Limitations of Wi-Fi: <ul><li>Security concern </li></ul><ul><li>High power consumption </li></ul><ul><li>Interference from other devices </li></ul><ul><li>Scarcity of hot spots </li></ul>
  14. 14. Summary: <ul><li>Understand it </li></ul><ul><li>Plan it </li></ul><ul><li>Implement it </li></ul><ul><li>Use it </li></ul><ul><li>Refine it </li></ul><ul><li>Support it </li></ul>