Wi n s o c k提供的异步I / O模型。和W S A A s y n c S e l e c t模型类似的是，它也允许应用程序在一个或多个套接字上，接收以事件为基础的网络事件通知。-Wi nsock provide asynchronous I/O model. And WSAA sync S elect a similar model, it also allows applications on one or more sockets to receive event-based