Wireless QOTD for May 19th

Discussion in 'Wireless' started by tripwire45, May 19, 2004.

?

Robin is an experienced network technician taking a class in WLANs to expand her skills. She knows

  1. A. Robin's teacher explains that PCF modes requires the use of CSMA/CA as a polling function

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  2. B. Robin's teacher explains that CSMA/CD creates too much overhead on a WLAN due to acknowledgements

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  3. C. Robin's teacher explains that CSMA/CD would be unable to get the appropriate responses from sleep

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  4. D. Wireless LANs are unable to detect collisions due to the difference in media from a wired LAN

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  1. tripwire45
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    tripwire45 Zettabyte Poster

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    Answer later.
     
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  2. Phil
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    Phil Gigabyte Poster

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    I'm going with D today.
     
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  3. punkboy101
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    punkboy101 Back from the wilderness

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    I'm gonna go for D too.
     
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  4. tripwire45
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    tripwire45 Zettabyte Poster

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    One hour countdown, folks. Any last takers?
     
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  5. tripwire45
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    tripwire45 Zettabyte Poster

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    May 19, 2004 #5
    Time's up. The group has it. Correct answer is D. WLANs can't "hear" a collision when it occurs so CSMA/CD is out. CSMA/CA or Carrier Sense Multiple Access/Collision Avoidance (as opposed to Colllision Detection) is used to broadcast a signal prior to transmitting the actual data. These signals add to WLAN network overhead, though.

    Obviously, I'm being much too easy on you. More tomorrow.
     
    Certifications: A+ and Network+

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