A Dedicated Administrator Connection (DAC) for a database server is
provided that allows a user with administrator privileges to connect to
the database server when a connection by standard means fails. By
allowing an administrator to connect to the server through the DAC, the
administrator can resolve the issue despite the failure and bring back
the server to a responsive state without requiring the server to be shut
down and restarted. Additionally, support engineers, developers, etc. can
use the DAC to diagnose a range of problems without the use of a debugger
or requesting a repro while monitoring for issues.