The two most popular transport layer protocols are the transmission control protocol (TCP) and the user datagram protocol (UDP)

两种最流行的传输层协议是传输控制协议（TCP）和用户数据报协议（UDP）

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Add a data transfer module including user datagram protocol and transmission control protocol.

添加数据传输模块，分别实现了用户数据报协议和传输控制协议。

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Firstly, this thesis studies the widely used class of network transmission control protocol, namely TCP flow sending rate model.

本文首先对广泛应用的网络传输控制协议TCP流的发送速率模型进行研究和分析。

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Known as TCP, the Transmission Control Protocol is core to the functioning of the the Internet.

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For example, on Monday Google engineers proposed changes to the Transmission Control Protocol in order to make the Web faster.

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