在快速以太网物理层标准中，使用两对5类无屏蔽双绞线的是（）。
- A.100BASE-TX
- B.100BASE-F
- C.100BASE-T4
- D.100BASE-CX
正确答案及解析
正确答案
解析
FX表示光纤，T4是使用4对UTP，可以是3类和4类，5类线。CX只有1000base-cx，这里是干扰项。
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