找考题网-背景图
单项选择题

A. connection orientedB. connectionlessC. high bandwidt……

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

A. connection oriented
B. connectionless
C. high bandwidth utilization
D.poor real-time

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