基于完成端口模型的学生考试系统，包括服务端和客户端以及ACCESS数据库的操作-Port model based on students who complete the examination system, including server and client, and the operation of ACCESS database

一个多线程并发服务器程序，服务端启动后，监听客户端连接，接受客户端消息，并操作数据库。-A multi-threaded concurrent server program, the server starts listening for client connections, the client accepts the message, and operation of the database.