多项选择题
A.3类UTP B.4类UTP C.5类UTP D.6类UTP
A.IEEE 802.3ae B.IEEE 802.3ab C.IEEE 802.3ak D.IEEE 802.3an
A.10GBASE-SR/SW B.10GBASE-LR/LW C.10GBASE-ER/EW D.10GBase-LX4
A.100m B.200m C.550m D.2km
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