05024ba1_nfig_Inheritance_and_Overrides__Configuration_level
[File name] ApplicationHost.config [File description] ApplicationHost.config is the root file of the IIS 7.0 configuration system. It includes definitions of all sites, applications, virtual directories, and application pools, as well as global defaults for the Web server settings. It is in the following location: %windir%\system32\inetsrv\config [Configuration level] 
IIS
S e r v e r
I I S
R o o t W e b
W e b s i t e
A S P . N E T a p p l i c a t i o n r o o t d i r e c t o r y
A S P . N E T a p p l i c a t i o n s u b d i r e c t o r y
Jon Galloway - 10 Things ASP.NET Developers Should Know About Web.config Inheritance and Overrides
Configuration level