Wi fi
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Three types of frames:
Control
(ACK,RTS,CTS ,Power Save …)
Management
(Beacon,Probe Request ,Probe Response,
Association request , Association response …)
Data
(Data, Null Data, Data_CF_Ack , ….)

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Wi fi Presentation Transcript

  • 1. WiFi 1 WiFi Is for “Wireless Fidelity” Or IEEE 802.11 Standard By Greg Goldman
  • 2. WiFi 2 What is the goal of 802.11 standard ?  To develop a Medium Access Control (MAC) and Physical Layer (PHY) specification for wireless connectivity for fixed, portable and moving stations within a local area.
  • 3. WiFi 3 802.11 sub-standards(amendments ) ….  802.11 MAC (Media Access Control) ratified 1999  802.11b PHY 2.4 GHz (max 11 Mbps) ratified 1999  802.11a PHY 5.0 GHz (max 54 Mbps) ratified 1999  802.11g PHY 2.0 GHz (max 54 Mbps) ratified 2003  802.11i Security draft number XXX  802.11e QoS, Multimedia draft number XXX  802.11h European regulations for 5GHz draft number XXX  802.11h Japan regulations for 5GHz draft number XXX 
  • 4. WiFi 4 Do I need any license to use 802.11 device ?  No , 2.4 GHz and 5.0 GHz are public available frequency !!!
  • 5. WiFi 5 Context with OSI layers
  • 6. WiFi 6 Logical Link Control Services
  • 7. WiFi 7 Standard 802.11 frame format
  • 8. WiFi 8 Frames types and subtypes  Three types of frames:  Control (ACK,RTS,CTS ,Power Save …)  Management (Beacon,Probe Request ,Probe Response, Association request , Association response …)  Data (Data, Null Data, Data_CF_Ack , ….)