() switching was invented in the late 1960s for data communications.
() switching was invented in the late 1960s for data communications.
A．Frame B．Link C．Packet D．Line
正确答案：C
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() switching was invented in the late 1960s for data communications.
A．Frame B．Link C．Packet D．Line
正确答案：C
词条内容仅供参考，如果您需要解决具体问题
（尤其在法律、医学等领域），建议您咨询相关领域专业人士。