Database Security Products (MOSC)

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sys authentication

edited Oct 7, 2009 11:21PM in Database Security Products (MOSC) 7 comments
  Hi,
I have a query :

When our oracle database/instance is down and we do following :
at unix prompt =

sqlplus /nolog

sql > conn / as sysdba

I need to know what exactly happnes at that time .
How is the " sys " user authenticated when the DB itself is down ?

I know many will say OS authenthicatin , but again when the DB is
down how will that work ?

Please let me know if you have any details :

Thanx

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