Introduction - If you have any usage issues, please Google them yourself
Based on C/S structure Socket programming that is both side of communication as a server waiting for client request and response. Customers in need of services to the server application. Server in general has always been run as a daemon, listening network port, once the customer has requested, it will start a service process to respond to the client, at the same time continue to monitor their own service port, so that later customers can receive timely services.