Madge Networks 802.11b Manuel d'utilisateur Page 26

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802.11 Modes of Operation
Most wireless devices cannot transmit and listen
at the same time on a single frequency, thus
CSMA/CD is not used
The supported modes of operation are:
DCF, Distributed Coordination Function
No central controller; just like Ethernet
Protocols used are:
CSMA/CA (CSMA with Collision Avoidance)
CSMA/CA with virtual channel
–PCF, Point Coordination Function
The base station controls all activities
Prioritized transmissions possible
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