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Now a days the authors are trying to improve through put and efficiency of existing MAC protocols used, suffering from different problem like Request to send and clear to send message propagation, and channel chapter effect or Unfairness due to using Binary Exponential Backoff algorithm, effect of noise in communication path, but it may be Possible to cause an attack by Manipulating traffic in the MAC layer and propagate attack to the routing layer then they are in a dilemma how to improve performance of MAC layer protocols. Differentiation of attack and congestion in wireless network is a big issue.
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