httpd config question

[b0x3r]

What is the difference between the following:
<Directory />
Options None
AllowOverride None
Order deny,allow
Deny from all
</Directory>

<Directory "/home/httpd/ona">
Options None
AllowOverride None
Order allow,deny
Allow from all
</Directory>

The website worked fine with just the first directory entry. However, the information states it is best to enter a second directory entry. I did and everything works, I am just not clear as to why it is important.

 

[UpQuark77]

from apache guide (redhat): --> http://www.linuxvalley.it/encyclopedia/ldp/guide/sol/chap29sec252.html

= "ona is the DocumentRoot, the directory out of which you will serve your documents, in our example."