Okay, being a newbie to the adminstration side of SQL Server, I have to ask!

Given that BOL says the following:

sp_configure 'show advanced options', 1;

GO

RECONFIGURE;

GO

sp_configure 'clr enabled', 1;

GO

RECONFIGURE;

GO

How do you determine that only the last 4 lines are necessary (as the answer to the question implies). What are the first 4 lines doing (okay, the "GO" isn't doing anything...)? BOL doesn't specify, it just gives you this code and then talks about what "sp_configure 'clr enabled', 1" does.