We carry out a three layers network subsystem structure that is protocol independent layer in kernel, protocol dependent layer in kernel and userlevelprotocol stack.
论文提出了一个三层网络子系统结构：内核级协议无关层、内核级协议相关层和用户级协议栈。
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Furthermore, UDT is not only a new control algorithm, but also a new application levelprotocol with support for user configurable control algorithms and more powerful APIs.
Since the UNIX sockets interface based on TCP/IP protocol has succeed in communication, of course the user-level sockets over ULC will be popular to programmer, which is motivation of thesis.