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X.25协议是一种（ ）。
分类: 通信专业业务
发布时间: 2023-11-19 11:56
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X.25协议是一种（ ）。
A.A、报文交换协议
B.B、电路交换协议
C.C、帧交换协议
D.D、报文分组交换协议
正确答案是C
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