Carrier sense multiple access with collision avoidance (CSMA/CA) in computer networking, is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by transmitting only when the channel is sensed to be "idle".
It is particularly important for wireless networks, where the collision detection of the alternative CSMA/CD method is not possible for technical reasons.
CSMA/CA is a protocol that operates in the Data Link Layer (Layer 2) of the OSI model.
Read more about Carrier Sense Multiple Access With Collision Avoidance: Details, IEEE 802.11 RTS/CTS Exchange, Performance, Usage
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