Most likely, we run into so-called "Stateless Connection" every now and then. However, I found there's few articles which can gives a specific and distinct explanation to what "Stateless" does mean.
Let me put it in this way:
Stateless means that each request from client to server must contains all of the information necessary to understand the request, from the perspective of server, and cannot take advantage of any stored context on the server. Session state is therefore kept entirely on the client.
Is it clear now?
Written on 31 March 2016