What are Async Sockets?

Question

What are Async Sockets? How are they different from normal sockets (Blocking and Non-Blocking)?

Any pointers in that direction or any links to tutorials will be help

Answer 1

If a server uses a synchronous socket, while it is waiting for data from the client, its main thread is blocked, so the server won't be doing anything... that is bad if you have multiple clients connecting. In an asynchronous socket, you CAN do other stuff while waiting for the client to send data to you, so now you CAN have multiple clients connecting to you

Synchronous uses a function like receive() which blocks until it gets a message

Asynchronous has beginReceive() endReceive() or similar functions. It uses callbacks, when a message is received, the callback is invoked