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判断题 SMTP is a protocol for file transfer. ( ) 对 ( ) 错
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判断题 FTP is a protocol for file transfer. ( ) 对 ( ) 错
判断题 The physical layer is responsible for transmitting a bit stream over a physical medium. ( ) 对 ( ) 错
判断题 The session layer is responsible for transmitting a bit stream over a physical medium. ( ) 对( ) 错
判断题 The data-link layer organizes bits into logical units called frames. It is responsible only for node-to-node delivery of the frame. ( ) 对( ) 错
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