How often does the letter . occur in:
Q: SQL Authentication vs Windows Authentication In our server application we use single account to access to the SQL Server. We used to use SQL Authentication. Now we are thinking to remove credentials from config files; and one of the solutions is to use Windows Authentication.  
We are mostly concerned about performance. Is there any differences?
Another problem, is domain controller that occasionally could be down. Is SQL will be able authenticate in this case? 
What do you think?

A: You shouldnt see any noticeable performance issues, assuming that all is well with your network and domain.  Youll most likely see impersonation / delegation problems before you start seeing performance issues.

user
In that passage, there are seven occurrences of the letter ".."
assistant