How can you share Session state information across a Web garden or Web farm ?

Answer:

You can share Session state information across a Web garden or Web farm in two ways which are provided by ASP.NET.They are:

1) A state server, as specified by a network location:
This is a simple technique to implement.This technique doesn’t require you to install Microsoft SQL Server.

2) A SQL database, as specified by a SQL connection:
Inorder to store and retrieve the state information, this technique will provide the best performance.