以下关于以太网的叙述中，不正确的是（ ） 。
- A.采用了载波侦听技术
- B.具有冲突检测功能
- C.支持半双工和全双工模式
- D.以太网的帧长度固定
正确答案及解析
正确答案
解析
在传统共享以太网中，所有的节点共享传输介质，采用CSMA/CD冲突检测的载波监听多路访问技术实现传输介质共享。以太网的最小帧长64Byte,最大帧长1518Byte,其中有效载荷（数据）46~1500Byte.
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