单项选择题
A.全频中继 B.音频中继 C.单路中继 D.基带全中继
A.F≥49.9-(HOP-NUM)×[(HOP-STEP)-1] B.F≤49.9-(HOP-NUM)×[(HOP-STEP)-1] C.F≥49.9-(HOP-STEP)×[(HOP-NUM)-1] D.F≤49.9-(HOP-STEP)×[(HOP-NUM)-1]
A.8kbit/s B.16kbit/s C.32kbit/s D.64kbit/s
A.电路交换 B.分组交换 C.ATM交换 D.IP交换
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