Johny Learns

What is CSMA/CA?

Johny: Dad, I know something about CSMA/CD. But what is this CSMA/CA?

Dad :  In case of  CSMA/CD, each node will try to transmits data, only when the medium is idle. If  collision is detected, the frame is retransmitted. But collision detection is not feasible in Wireless LAN. Hence WLAN uses Collosion Avoidance instead of Collision Detection. CSMA/CA stands for Carrier Sensing Multiple Access/Collision Avoidance (CSMA/CA).