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在OSI参考模型中，第N层与第N+1层之间的关系是（）

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在OSI参考模型中，第N层与第N+1层之间的关系是（）

A.第N层是第N+1层的服务提供者

B.第N+1层从第N层接收报文并添加报头

C.第N层使用第N+1层提供的服务

D.第N层与第N+1层没有直接关系

参考答案:

答案：A

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