Circuit-switching technology is used in Public Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and Code Division Multiple Access(CDMA). It is a ( ) information transfer mode.

2023-08-25

A.Connection oriented
B.connectionless
C.High bandwidth utilization
D.Poor-real-time

参考答案:A

电路交换技术用于PSTN、GSM和CDMA,它是一种(72)信息传输模式。

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