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Wireless QOTD for May 28th

Discussion in 'Wireless' started by tripwire45, May 28, 2004.

  1. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

    Eric is studying direct sequence RF systems including the 802.11b system. He is focusing on radio frequency dynamics and specifications and is learning the width of each of the 11 channels of an 802.11b device (U.S. specifications). In Eric’s reading, what does he find out?

    A. 802.11b channels are each 5 MHz wide
    B. 802.11b channels are each 20 MHz wide
    C. 802.11b channels are each 22 MHz wide
    D. 802.11b channels are each 43 MHz wide

    Choose the best answer. Answer later.
    Certifications: A+ and Network+
  2. punkboy101
    Honorary Member

    punkboy101 Back from the wilderness

    I'm clueless on this one (what else is new!), but I'm gonna go with C today.
    A sounded good, but i'll take C.
    Certifications: CCNA
    WIP: Nada
  3. nugget
    Honorary Member

    nugget Junior toady

    I'll take C too.
    Certifications: A+ | Network+ | Security+ | MCP (270,271,272,290,620) | MCDST | MCTS:Vista
    WIP: MCSA, 70-622,680,685
  4. AJ

    AJ Administrator Administrator

    :eek: not a clue

    Try B just to be different.
    Certifications: MCSE, MCSA (messaging), ITIL Foundation v3
    WIP: Looking at doing ..................
  5. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

    In this case AJ, following the crowd would have worked better. Correct answer is C. Each channel is 22 MHz wide. In fact, under the US standards, we are allowed 11 channels in 802.11b and g devices but only channels 1, 6, and 11 don't overlap. That 22 MHz width actually covers the areas of about five channels. There is even a small bit of overlap between 1 and 6 and between 6 and 11 but it usually isn't significant. Channels any closer overlap enough to produce interference.

    That's it for the week. Have a good one. See you Monday.
    Certifications: A+ and Network+

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