Two-way communication connection realizes the exchange of data

Depending on how the connection is started and the destination to which the local socket is connected, the connection between sockets can be divided into three steps: Server listening, client request, connection acknowledgement.

(1) Server monitoring: Is the server end socket does not locate the specific client socket, but in the status of waiting for the connection, real-time monitoring network status.

(2) Client request: Refers to the client's socket to make a connection request, to connect to the target is the server-side socket. To do this, the client's socket must first describe the socket of the server it is connecting to, indicate the address and port number of the server-side socket, and then make a connection request to the server-side socket.

(3) Connection confirmation: When the server-side socket is heard or received a client socket connection request, it responds to the client socket request, set up a new thread, the server-side socket description to the client, once the client confirms the description, the connection is established. While the server-side socket continues to be in the listening state, it continues to receive connection requests from other client sockets.

Two-way communication connection realizes the exchange of data