As you can see, the output stream is parameterized: you can send some logs to a file and others to a network socket.

可以看出，输出流是参数化的：您可以把一些日志记录放在文件中，其他的送往网络套接字。

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The architectural diagram below in Figure 3 shows how the client and server applications have access to a socket that has an input and an output stream.

图3中的架构图显示了客户端和服务器应用程序如何访问具有输入和输出流的套接字。

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The output stream of the socket becomes the input stream to the server application and vice-versa.

套接字的输出流将成为服务器应用程序的输入流，反之亦然。

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