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How Secure Is Your Wireless Network? Safeguarding Your Wi-Fi LAN by CCNA Lee Barken - CISSP MCP, CPA

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802.11 (1997)

After discussion and debate (dating back to the early 1990s), the “original” 802.11 specification was ratified in 1997. Data rates of 1 or 2 megabits per second (Mbps) were supported. The protocol covers Layer 1 (physical) and Layer 2 (data link) of the OSI model. At the data link layer, 802.11 provides definitions for the following services:

  • Authentication/Deauthentication

  • Association/Disassociation/Reassociation

  • Privacy (WEP)

  • Mac Service Data Unit (MSDU) delivery

Three different methods were specified at the physical layer:

  • Direct Sequence spread spectrum (DSSS)

  • Frequency Hopping spread spectrum (FHSS)

  • Infrared (IR)

Most people are not aware that the 802.11 protocol actually included support for IR. Although 801.11 over IR is technically ...

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