What is the Kerberos Authentication? What are the security features difference between Windows 2000 and 2003 versions? How it is behaved within Failover Clustering? How to enable Kerberos Authentication Including SQL Server Virtual Servers on Server Clusters? Let us see how the user access to SQL Server resources is controlled by two separate mechanisms. The first one is authentication, which determines the identity of a user attempting to connect, based on a verifiable identifier. The second one...(
read more)
Read the complete post at http://sqlserver-qa.net/blogs/perftune/archive/2007/08/31/1824.aspx