deactivating network connexion using NetworkManager

[Bernard <bdebreil@teaser.fr>]

Hi to Everyone,

A few weeks ago, I have decided that, whenever my PC was to stay on for 
awhile without being used, I would disconnect the internet connexion, 
using the Gnome "Network Manager" for this purpose (right click then 
uncheck "activate the network"). Today, I wonder how efficient that is, 
in regard to security risks, since it seems likely that the Internet 
link must still be up, if it was not the case, how to explain that the 
re-activating process is so quick ?

Maybe it is better to physically disconnect the Ethernet wire at the 
back on the main board... which is not always an easy operation, 
depending on one's setup.