December 2017
Intermediate to advanced
434 pages
10h 14m
English
SQL Server comes with two authentication modes--SQL Server and Windows Authentication mode and Windows Authentication mode. You can choose the authentication mode during installation and you can always change the mode afterward in the SQL Server configuration, which requires a service restart after the change. The following image gives a good idea of authentication options:

If the Windows Authentication mode is turned on, then SQL Server can use several different principals to evaluate your access:
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