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Dedicated Admin Console (DAC) a reserved connection on SQL Server that grants special access to system tables and can help diagnose problems

3 votes

No DAC connection could be established on the default port. Make sure DAC is enabled

The Remote DAC is very useful in an emergency situation where the server is so pinned down that you can't even RDP to it. … I enable Remote DAC on all servers as part of my post-SQL install steps. …
Tara Kizer's user avatar
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