动画演示!无线局域网标准802.11的MAC和802.3协议的MAC非常相似，都是在一个共享媒体之上支持多个用户共享资源，由发送者在发送数据前先进行网络的可用性检测。在802.3协议中，是由一种称为CSMA/CD(Carrier Sense Multiple Access with Collision Detection)的协议来完成调节，这个协议解决了在Ethernet上的各个工作站如何在线缆上进行传输的问题，利用它检测和避免当两个或两个以上的网络设备需要进行数据传送时网络上的冲突。
The CSMA/CA protocol is the most widely-compete agreement used by a network. Therefore, MAC.layer of cognitive radio networks mostly use the CSMA/CA protocol to provide the competitive channel.resources. Due to the unique characteristics and related
The CSMA/CA protocol is the most widely-compete agreement used by a network. Therefore, MAC .layer of cognitive radio networks mostly use the CSMA/CA protocol to provide the competitive channel .resources. Due to the unique characteristics and relate
