Answer:
There are three different techniques of managing session in ASP.NET
InProc
Session state is stored locally in memory of ASP.NET worker process.
StateServer
Session state is stored outside ASP.NET worker process and is managed by Windows service. Location of this service is specified by stateConnectionString attribute.
SQLServer
Session state is stored outside ASP.NET worker process in SQL Server database. Location of this database is represented by sqlConnectionString attribute.
For more details, please visit
http://shailkpatel.blogspot.com/2007/03/session-management-techniques.html895r
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