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  3. The TCP／IP stack is a complete set ofnetworking protocols．The OSI Model was meantto be a standardized way of connecting devices

The TCP／IP stack is a complete set ofnetworking protocols．The OSI Model was meantto be a standardized way of connecting devices

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问题 The TCP／IP stack is a complete set ofnetworking protocols．The OSI Model was meantto be a standardized way of connecting devices together,and most protocols have some direct correlation to the OSI Model．The OSI Model has 7 layers，the fourth layer is called (    )．
选项 A、physical layer
B、data link layer
C、application layer
D、transport layer
答案D
解析 TCP／IP协议栈是一种网络协议实现。OSI模型是用来进行设备间连接标准化的一种模型。OSI模型包含7层，第四层是传输层。
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