PRESENTATION     ON
CONTENTSIntroduction             LimitationsHow it works             SecurityComponents               TopologyComparision ...
INTRODUCTIONWireless Technology is an alternative to WiredTechnology, which is commonly used, forconnecting devices in wir...
HOW IT WORKSA Wi-Fi hotspot is created by installing an access point to aninternet connection that acts as a base station....
COMPONENTSAccess Point (AP) - The AP is a wireless LANtransceiver or “base station” that can connect one ormany wireless d...
Embedded serial-to-   An outdoor Wi-Fi access   An embedded Router BoardWi-Fi module          point                     11...
COMPARISION OF ALL VERSIONSProperties   802.11 b 802.11 a 802.11 g 802.11 nORIGIN       1999     2001     2003       2009S...
ADVANTAGESUnmatched mobility & elasticityCan be expanded with growthQuick easy setupMore faster & secureConvenienceMultipl...
LIMITATIONSHigh power consumptionScarcity of hot spotsUpdating older computerPrivacy concernsInterference leading to degra...
SECURITYDATA INTEGRITYENCRYPTIONAUTHENTICATIONThe most common wireless encryption-standard, Wired Equivalent Privacy (WEP)...
TOPOLOGYTopology can be referred as a model of connections ofdifferent wifi devices to other devices and sources.    AP-ba...
AP-based TopologyThe client communicate through Access Point.BSA (Broad Band Signal Analyzers) - RadioFrequency coverage p...
Peer to peer (Ad-hoc Mode)AP is not required.Client devices within a cell can communicatedirectly with each other.It is us...
Point to multipoint bridgeThis is used to connect a LAN in one building to aLANs in other buildings even if the buildings ...
WiFi HOTSPOTSPhysical location that offers internet access overa wireless LANFound in coffee shops, hotels, airports etc.T...
Wi-fi configurationsPRESENTATION ON WI-FI         SLIDE - 16 OF 20
Wi-fi configurationsPRESENTATION ON WI-FI         SLIDE - 17 OF 20
Wi-fi configurationsPRESENTATION ON WI-FI         SLIDE - 18 OF 20
Wi-Fi ApplicationsHomeSmall BusinessesLarge Corporations & CampusesHealth CareWireless ISP (WISP)TravellersPRESENTATION ON...
CONCLUSIONTo conclude, it is really up to us to be responsiblefor decisions using these devices. Even though wehave the lu...
THANK YOU      PRESENTED BY,      AJAYA KUMAR PATEL
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WI FI

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WI FI

  1. 1. PRESENTATION ON
  2. 2. CONTENTSIntroduction LimitationsHow it works SecurityComponents TopologyComparision of all Hotspots types ConfigurationAdvantages Conclusion PRESENTATION ON WI-FI SLIDE - 2 OF 20
  3. 3. INTRODUCTIONWireless Technology is an alternative to WiredTechnology, which is commonly used, forconnecting devices in wireless mode.Wi-Fi (Wireless Fidelity) is one example thatallows an electronic device to exchange datawirelessly over a computer network, including ahigh speed internet connections.An wireless local area network products basedon the Institute of Electrical and Electronics(IEEE) 802.11 standards. PRESENTATION ON WI-FI SLIDE - 3 OF 20
  4. 4. HOW IT WORKSA Wi-Fi hotspot is created by installing an access point to aninternet connection that acts as a base station.When Wi-Fi enabled device encounters a hotspot the device canthen connect to that network wirelessly.A single access point can support up to 30 users and can functionwithin a range of 100 -150 feet indoors and up to 300 feet outdoors.Many access points can be connected to each other via Ethernetcables to create a single large network.Wi-Fi radio s have a slight difference to other radio’s, Wi-Fi radio’stransmit frequencies of 2.4 GHz or 5GHz, a considerable highfrequency than that used by cell phones or television radio waves.The reason being the higher the frequency the more data can becarried by the signal. PRESENTATION ON WI-FI SLIDE - 4 OF 20
  5. 5. COMPONENTSAccess Point (AP) - The AP is a wireless LANtransceiver or “base station” that can connect one ormany wireless devices simultaneously to the Internet.Wi-Fi cards - They accept the wireless signal and relayinformation. They can be internal and external.(e.g.PCMCIA Card for Laptop and PCI Card for DesktopPC)Safeguards - Firewalls and anti-virus software protectnetworks from uninvited users and keep informationsecure. PRESENTATION ON WI-FI SLIDE - 5 OF 20
  6. 6. Embedded serial-to- An outdoor Wi-Fi access An embedded Router BoardWi-Fi module point 112 PRESENTATION ON WI-FI SLIDE - 6 OF 20
  7. 7. COMPARISION OF ALL VERSIONSProperties 802.11 b 802.11 a 802.11 g 802.11 nORIGIN 1999 2001 2003 2009SPEED 11 Mbps 54 Mbps 54 Mbps 540 MbpsFREQUENCY 2.4 Ghz 5 Ghz 2.4 Ghz 2.4 or 5 GhzRANGE 100-120 25-75 100-120 120-375 feet feet feet feet PRESENTATION ON WI-FI SLIDE - 7 OF 20
  8. 8. ADVANTAGESUnmatched mobility & elasticityCan be expanded with growthQuick easy setupMore faster & secureConvenienceMultiple Connections by sharing hardwareInexpensiveGood for business PRESENTATION ON WI-FI SLIDE - 8 OF 20
  9. 9. LIMITATIONSHigh power consumptionScarcity of hot spotsUpdating older computerPrivacy concernsInterference leading to degradation inperformanceLimited range PRESENTATION ON WI-FI SLIDE - 9 OF 20
  10. 10. SECURITYDATA INTEGRITYENCRYPTIONAUTHENTICATIONThe most common wireless encryption-standard, Wired Equivalent Privacy (WEP),has been shown to be easily breakableeven when correctly configured. PRESENTATION ON WI-FI SLIDE - 10 OF 20
  11. 11. TOPOLOGYTopology can be referred as a model of connections ofdifferent wifi devices to other devices and sources. AP-based ( Infrastructure Mode ) Peer to peer (Ad-hoc Mode) Point to multipoint bridge PRESENTATION ON WI-FI SLIDE - 11 OF 20
  12. 12. AP-based TopologyThe client communicate through Access Point.BSA (Broad Band Signal Analyzers) - RadioFrequency coverage provided by an AP.ESA-It consists of 2 or more BSA.ESA cell includes 10-15% overlap to allowroaming. PRESENTATION ON WI-FI SLIDE - 12 OF 20
  13. 13. Peer to peer (Ad-hoc Mode)AP is not required.Client devices within a cell can communicatedirectly with each other.It is useful for setting up of a wireless networkquickly and easily. PRESENTATION ON WI-FI SLIDE - 13 OF 20
  14. 14. Point to multipoint bridgeThis is used to connect a LAN in one building to aLANs in other buildings even if the buildings aremiles apart. These conditions receive a clear line ofsight between buildings.The line-of-sight range varies based on the type ofwireless bridge and antenna used as well as theenvironmental conditions. PRESENTATION ON WI-FI SLIDE - 14 OF 20
  15. 15. WiFi HOTSPOTSPhysical location that offers internet access overa wireless LANFound in coffee shops, hotels, airports etc.These are two types- free and commercialFree - Uses open public network , Wi-Fi routerrequired , No control on routerCommercial - Monthly or yearly subscriptionrequired , Any mode of payment could be used ,May allow free access to certain sites. PRESENTATION ON WI-FI SLIDE - 15 OF 20
  16. 16. Wi-fi configurationsPRESENTATION ON WI-FI SLIDE - 16 OF 20
  17. 17. Wi-fi configurationsPRESENTATION ON WI-FI SLIDE - 17 OF 20
  18. 18. Wi-fi configurationsPRESENTATION ON WI-FI SLIDE - 18 OF 20
  19. 19. Wi-Fi ApplicationsHomeSmall BusinessesLarge Corporations & CampusesHealth CareWireless ISP (WISP)TravellersPRESENTATION ON WI-FI SLIDE - 19 OF 20
  20. 20. CONCLUSIONTo conclude, it is really up to us to be responsiblefor decisions using these devices. Even though wehave the luxury having no cords attached to allthese devices, we need to be careful. We need toalso keep the traditions of using regular books sodon’t forever loose paper books. It is importantwe use this technology with respect withoutgetting too connected to these devices so wedon’t depend on them too much. This technologyis to help and not hurt us or loose otherimportant objects. PRESENTATION ON WI-FI SLIDE - 20 OF 20
  21. 21. THANK YOU PRESENTED BY, AJAYA KUMAR PATEL

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