title: How do stateless servers work?
body: <p>I try to understand this.  Normally each time user login system, server side will create a session, while user client side there is cookie. When people talk about stateless serverside, stateful client side, what do they mean? server side no need use session keep track user? only use cookies on client side to check user? mean if I change server, user will not notice it and still can resume using the service?  </p>
  
  <p>How to configure spring-security to to do this?</p>