The cable used in the Ethernet 1000BASE-LX standard is _______ The maximum transmission distance is ________ .
A . 2 pairs of Category 5 UTP twisted pair, 100m
B . multi- mode fiber, 550m
C . 4 pairs of Category 3 UTP twisted pair, 100m
D . single -mode optical fiber, 5000m
E . 4 pairs of Category 5 UTP twisted pair, 100m
F . 2 pairs of STP twisted pair, 25m
Answer: D
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