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802.11 Standard: Comparison and Security

802.11 Standard: Comparison and Security. Jason Gibson TCM471 Professor Crum. Introduction: History . Television Remote Control Cordless Phones Cellular Phones Business Applications. IEEE Institute of Electrical and Electronics Engineers. Ensure Compatibility Define Standards

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802.11 Standard: Comparison and Security

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  1. 802.11 Standard:Comparison and Security Jason Gibson TCM471 Professor Crum

  2. Introduction: History • Television Remote Control • Cordless Phones • Cellular Phones • Business Applications

  3. IEEEInstitute of Electrical and Electronics Engineers • Ensure Compatibility • Define Standards • Research New Technology • Wireless Standards • 802.11 • 802.11b • 802.11a • 802.11g

  4. Developed in 1997 Supports High Data Rates - 1 to 2 Mbps Operates at 2.4 GHz Layer 1 FHSS DSSS Layer 2 - CSMA/CA IEEE 802.11

  5. Released in 1999 Support Higher Data Rates - 5.5 to 11 Mbps Operates at 2.4 GHz 3 non-overlapping channels Long Range Problem Interference IEEE 802.11b

  6. Released September 1999 Support Higher Data Rates - 54 Mbps Operates at 5 GHz OFDM Problems Limited Range Interoperability IEEE 802.11a

  7. IEEE 802.11g • Scheduled Approval, May 2003 • Support High Data Rates like 802.11a - 54 Mbps • Operates at 2.4 GHz like 802.11b • Backward Compatibility

  8. Wireless Local Area Networks

  9. Ad-hoc Mode - IBSS • Clients in same cell communicate directly • Other clients act as gateways within cell • Bluetooth

  10. Infrastructure Mode - BSS • Centrally located access point • Management Frame Exchange • Association Process

  11. Security Methods • Wired Equivalency Protocol (WEP) • Security Measures • Authentication • Confidentiality • Integrity • Vulnerabilities

  12. Types of Attacks • Passive Attack • Eavesdropping • Traffic Analysis • Active Attack • Masquerading • Denial of Service

  13. Security Solutions • Utilize Multiple Defensive Strategies • Virtual Private Networks (VPN’s) • Regular Password Updates • Changing Default SSID and Cryptographic Keys • Install Intrusion Detection system

  14. QUESTIONS?

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