Initially, when I had installed Debian 'Wheezy' on my old trusty laptop, it's network was managed by Network-Manager. However, at some point, I think I did something, which lead to the network connectivity, no longer being managed by Network-Manager, though the NM-applet continues to show-up on my GNOME classic desktop.
Question is, how can I get the configuration back to a state where network is again managed by Network-Manager ?