Chapter 50. Managing Session State in Clusters
What Is Session State?
The Web is a stateless environment. Every HTTP request or response to your Web server opens a connection, but after the action has completed, the connection is closed. These requests and responses contain no information to tell the server to associate a request with previous or subsequent requests. Session state is the process of associating a series of HTTP requests and responses with a unique user, and keeping a set of variables for that session.
A user session, not to be confused with a session variable, is defined as a related series of HTTP requests ...