單項選擇題在老式的令牌環(huán)網(wǎng)中,數(shù)據(jù)傳輸速度為()

A.4Mbit/s或16Mbit/s
B.4Mbit/s或8Mbit/s
C.16Mbit/s或32Mbit/s
D.16Mbit/s或64Mbit/s


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