ASP.NET Session state management

Define Session, SessionId and Session State in ASP.NET.

 A session is the duration of connectivity between a client and a server application.

SessionId is used to identify request from the browser. By default, value of SessionId is stored in a cookie. You can configure the application to store SessionId in the URL for a "cookieless" session.

What is Session Identifier?

Session Identifier is used to identify session. It has SessionID property. When a page is requested, browser sends a cookie with a session identifier. This identifier is used by the web server to determine if it belongs to an existing session. If not, a Session ID (120 - bit string) is generated by the web server and sent along with the response