| 802.11 MAC
Layer |
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| n | Priorities |
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| – | defined
through different inter frame spaces |
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| – | no
guaranteed, hard priorities |
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| – | SIFS
(Short Inter Frame Spacing) |
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| n | highest
priority, for ACK, CTS, polling response |
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| – | PIFS
(PCF IFS) |
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| n | medium
priority, for time-bounded service using PCF |
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| – | DIFS
(DCF, Distributed Coordination Function IFS) |
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| n | lowest
priority, for asynchronous data service |
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