Hello Friends, in this blog post(Compare CSMA, CSMA/CD, CSMA/CA Technique in MAC Layer) we are going to discuss a comparison between CSMA vs CSMA-CD vs CSMA-CA.
A station senses before transmitting.
CSMA is used in LANs configured in a bus topology.
To a certain extent, it can reduce collision. However, it does not eliminate the possibility and it does not provide the procedure to deal with them when they occur.
In CSMA a station continues transmission of a frame until the end of the frame even if a collision occurs.
Station sense before transmission.
CSMA/CD is used in wired LANs as a MAC method.
It is the same as CSMA except that it includes procedures to detect a collision and deal with them when they occur.
If a station is transmitting and a collision is detected then transmission of the wasted frame is abandoned.
station sense before transmission.
It is used with wireless LANs.
CSMA/CA is the same as CSMA/CD except CSMA/CA implements steps to prevent a collision from occurring.
We need to avoid collisions on wireless networks because they can not be detected.
Collisions are avoided through the use of CAMA/CA’s three strategies – the interframe space, the contention window, and acknowledgments.
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