单选题对于UDLD描述正确的是（）。A单项路径检测Bcisco私有协议C工作在2层D能够发现邻接设备
单选题
对于UDLD描述正确的是（）。
A
单项路径检测
B
cisco私有协议
C
工作在2层
D
能够发现邻接设备
参考解析
解析：
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