various modes of storing ASP.NET session

Which are the various modes of storing ASP.NET session?
• InProc: - In this mode Session, state is stored in the memory space of the
Aspnet_wp.exe process. This is the default setting. If the IIS reboots or web application
restarts then session state is lost.
• StateServer:-In this mode Session state is serialized and stored in a separate process
(Aspnet_state.exe); therefore, the state can be stored on a separate computer(a state
server).
• SQL SERVER: - In this mode Session, state is serialized and stored in a SQL Server
database.
Session state can be specified in element of application configuration file. Using
State Server and SQL SERVER session state can be shared across web farms but note this comes
at speed cost as ASP.NET needs to serialize and deserialize data over network repeatedly.