Explain csma/cd technique with exponential back-off algorithm and mention its use.
Answers
Besides the extension of Carrier Sense Multiple Access with Collision Detection, media access can also be provided with collision avoidance CSMA/CA. The latter is particularly needed when it comes to wireless connections; CSMA/CD doesn’t work well in radio networks for various reasons. The central problem here is the hidden station problem. This occurs when two stations do not recognize each other, but communicate simultaneously with a third station in the middle – which inevitably leads to collisions.
CSMA/CA, however, aims to avoid collisions (as the name suggests) instead of just recognizing them. If a collision does occur, a corresponding protocol is established. In this respect, CSMA/CA is an adaptation of CSMA/CD to another transmission medium.