what is session State ? How many types of session in ASP.NET? and where they are stored?

• when first client makes a request to the server ,asp.net worker processer will create a block of memort for individual users.
• sessions will expire after a certain amount of minutes, as configured in the web.config file.

Session Management can be achieved in two ways

1)InProc
2)OutProc

OutProc is again two types
1)State Server
2)SQL Server


InProcAdv.:
1) Faster as session resides in the same process as the application
2) No need to serialize the data

DisAdv.:1) Will degrade the performance of the application if large chunk of data is stored
2) On restart of IIS all the Session info will be lost

State Server

Adv:1) Faster then SQL Server session management
2) Safer then InProc. As IIS restart
won't effect the session data

DisAdv.:1) Data need to be serialized
2) On restart of ASP.NET State Service session info will be lost
3)Slower as compared to InProc

SQL Server
Adv.:1) Reliable and Durable
2) IIS and ASP.NET State Service
restart won't effect the session data
3) Good place for storing large chunk of data

DisAdv.:1) Data need to be serializedwhere they are stored.

2) Slower as compare to InProc and State Server
3)Need to purchase Licensed
version of SQL Server

1. inproc - default stored in web.config.
2. outproc - stored in server side.
3.Sql server - stored in database.