http://www.cnblogs.com/xufeiyang/articles/4878096.html
http://www.cnblogs.com/xufeiyang/articles/4533882.html
http://www.cnblogs.com/xufeiyang/articles/5010717.html
Socket通信原理探讨(C++为例) good
原文：http://www.cnblogs.com/findumars/p/6209711.html
