Presented by:- Nishant SinhaBranch: Information Technology
•   Introduction•   Wi-Fi Technologies•   Wi-Fi Architecture•   Wi-Fi Network Elements•   How a Wi-Fi Network Works•   Wi-...
•   Wireless Technology is an alternative to Wired    Technology, which is commonly used, for    connecting devices in wir...
Wi-Fi Networks use Radio Technologies totransmit & receive data at high speed:• IEEE 802.11b• IEEE 802.11a• IEEE 802.11g
•Appear in late 1999•Operates at 2.4GHZ radio spectrum•11Mbps(theoretical speed) within 30m    range•4-6Mbps(actual speed)...
•Introduced in 2001•Operates at 5GHZ(less popular)•54 Mbps(theoretical speed)•15-20Mbps (actual speed)•50-75feet range•Mor...
•It is extension of 802.11b,and shorter rangethan 802.11b•54Mbps(theoretical speed)•20-25Mbps(actual speed)•50-75feeet ran...
•   Access Point (AP) -              The AP is a wireless LAN    transceiver or “base station” that can connect one or man...
•   Basic concept is same as Walkie talkies.•   A Wi-Fi hotspot is created by installing an access point    to an internet...
•   AP-based topology•   Peer-to-peer topology•   Point-to-multipoint bridge topology
•   Home•   Small Businesses•   Large Corporations & Campuses•   Health Care•   Wireless ISP (WISP)•   Travellers
•   Wireless technology doesn’t remove any    old security issues, but introduces new    ones    • Eavesdropping    • Man-...
• Service Set Identifier (SSID)• Wired Equivalent Privacy (WEP)• 802.1X Access Control• Wireless Protected Access (WPA)• I...
•   Mobility•   Ease of Installation•   Flexibility•   Cost•   Reliability•   Security•   Use unlicensed part of the radio...
   Speed – Slower than cable   Range – Affected by various medium   Travels best through open space   Reduced by walls...
   Wi-Fi is one of the fastest growing    technologies.The Demand for connecting    devices without the use of cables is ...
   THANK YOU
Wifi technology
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Wifi technology

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Acemedic seminar presentation on WIFI

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Wifi technology

  1. 1. Presented by:- Nishant SinhaBranch: Information Technology
  2. 2. • Introduction• Wi-Fi Technologies• Wi-Fi Architecture• Wi-Fi Network Elements• How a Wi-Fi Network Works• Wi-Fi Network Topologies• Wi-Fi Configurations• Applications of Wi-Fi• Wi-Fi Security• Advantages/ Disadvantages of Wi-Fi
  3. 3. • Wireless Technology is an alternative to Wired Technology, which is commonly used, for connecting devices in wireless mode.• Wi-Fi (Wireless Fidelity) is a generic term that refers to the IEEE 802.11 communications standard for Wireless Local Area Networks (WLANs).• Wi-Fi Network connect computers to each other, to the internet and to the wired network.
  4. 4. Wi-Fi Networks use Radio Technologies totransmit & receive data at high speed:• IEEE 802.11b• IEEE 802.11a• IEEE 802.11g
  5. 5. •Appear in late 1999•Operates at 2.4GHZ radio spectrum•11Mbps(theoretical speed) within 30m range•4-6Mbps(actual speed)•100-150 feet range•Most popular, least expensive
  6. 6. •Introduced in 2001•Operates at 5GHZ(less popular)•54 Mbps(theoretical speed)•15-20Mbps (actual speed)•50-75feet range•More expensive•Not compatible with 802.11b
  7. 7. •It is extension of 802.11b,and shorter rangethan 802.11b•54Mbps(theoretical speed)•20-25Mbps(actual speed)•50-75feeet range•More expensive
  8. 8. • Access Point (AP) - The AP is a wireless LAN transceiver or “base station” that can connect one or many wireless devices simultaneously to the Internet.• Wi-Fi cards - They accept the wireless signal and relay information.They can be internal and external.(e.g PCMCIA Card for Laptop and PCI Card for Desktop PC)• Safeguards - Firewalls and anti-virus software protect networks from uninvited users and keep information secure.
  9. 9. • Basic concept is same as Walkie talkies.• A Wi-Fi hotspot is created by installing an access point to an internet connection.• An access point acts as a base station.• When Wi-Fi enabled device encounters a hotspot the device can then connect to that network wirelessly.• A single access point can support up to 30 users and can function within a range of 100 – 150 feet indoors and up to 300 feet outdoors.• Many access points can be connected to each other via Ethernet cables to create a single large network.
  10. 10. • AP-based topology• Peer-to-peer topology• Point-to-multipoint bridge topology
  11. 11. • Home• Small Businesses• Large Corporations & Campuses• Health Care• Wireless ISP (WISP)• Travellers
  12. 12. • Wireless technology doesn’t remove any old security issues, but introduces new ones • Eavesdropping • Man-in-the-middle attacks • Denial of Service
  13. 13. • Service Set Identifier (SSID)• Wired Equivalent Privacy (WEP)• 802.1X Access Control• Wireless Protected Access (WPA)• IEEE 802.11i
  14. 14. • Mobility• Ease of Installation• Flexibility• Cost• Reliability• Security• Use unlicensed part of the radio spectrum• Roaming• Speed
  15. 15.  Speed – Slower than cable Range – Affected by various medium Travels best through open space Reduced by walls, glass, water, etc
  16. 16.  Wi-Fi is one of the fastest growing technologies.The Demand for connecting devices without the use of cables is increasing everywhere.Wi-fi can be found on colleges campus,offices,& in many public areas.
  17. 17.  THANK YOU

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