When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?当提及一个数据包结构时，以下哪项可以表示一个TCP包在传输层的单个数据单元？（）A、TCP segment.TCP段B、TCP packet.TCP包C、TCP frame.TCP帧D、TCP datagram.TCP报文
When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?当提及一个数据包结构时，以下哪项可以表示一个TCP包在传输层的单个数据单元？（）
- A、TCP segment.TCP段
- B、TCP packet.TCP包
- C、TCP frame.TCP帧
- D、TCP datagram.TCP报文
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