问题
单项选择题
ADSL传输通道其下行通道、中速双工通道以及老式电话服务通道速率依次为()。
A.64kbit/s16~640kbit/s1.5~8Mbit/s
B.64kbit/s1.5~8Mbit/s16~640kbit/s
C.1.5~8Mbit/s16~640kbit/s64kbit/s
D.1.5~8Mbit/s64kbit/s16k~640kbit/s
答案
参考答案:C
ADSL传输通道其下行通道、中速双工通道以及老式电话服务通道速率依次为()。
A.64kbit/s16~640kbit/s1.5~8Mbit/s
B.64kbit/s1.5~8Mbit/s16~640kbit/s
C.1.5~8Mbit/s16~640kbit/s64kbit/s
D.1.5~8Mbit/s64kbit/s16k~640kbit/s
参考答案:C