Carrier Sense Multiple Access Collision Avoidance (CSMA/CA)
Carrier sense multiple access with collision avoidance (CSMA/CA) is, perhaps, the least popular of the access methods. In CSMA/CA, a computer will signal its intention to transmit before it actually transmits data. In this way, computers will sense when a collision might occur; this allows them to avoid transmission collisions. Unfortunately, this broadcasting of the intention to transmit data increases the amount of traffic on the cable and slows down network performance. This access method was once a popular method in the Macintosh environment and is now used with WLANs.
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