Question

I have two questions regarding using sockets for client server communication. Assume there is only 1 client in both the cases.

1) I know that we can send and receive data between client and server using a single socket. But in that case, what will happen when both the server and the client try to send the data at the same time?

2) Which of these is the best model?
i) Using single thread, single socket for sending and receiving
ii) Using 2 threads(one for sending and one for receiving), single socket
iii) Using 2 sockets and 2 threads, one for sending and one for receiving.

Answer 1

For question number one, nothing special will happen. TCP is fully duplex, both sides of a connection can send simultaneously.

And as there is no problem with sending/receiving simultaneously, the first alternative in your second question is going to be the simplest.