服务器如何知道客户端的端口号，它将使用它使用 Java 编程套接字将响应发送到客户端？

Question

In socket programming using java , we need to specify in the client side the port number in which it will communicate through it with the server using the socket class . On the other hand , in the server side , we don't need to specify the client port number through which we will send our responses to the client , we just create a port number through which we will listen to the request and we just wait for this request to arrive using the accept () method. So please someone explains how the responses are sent from server to clients although we don't specify the client port number ?

Answer 1

Both TCP port numbers are in every TCP segment. When the incoming TCP connection is accepted at the server, the server (specifically the TCP protocol implementation in the server) knows all it needs to know to respond to the client.