1) Yes, the network-manager-applet is the correct destination.
2) I don't know what the intended difference between "disconnect" and "disable" is supposed to be, however I expect that both should result in a total isolation from the network.
I therefore recommend that "disconnect" be removed from the drop-down menu of the network-manager-applet, since it duplicates the outcome of "disable", and does not work correctly anyway (allows slow traffic to pass through).
1) Yes, the network- manager- applet is the correct destination.
2) I don't know what the intended difference between "disconnect" and "disable" is supposed to be, however I expect that both should result in a total isolation from the network.
I therefore recommend that "disconnect" be removed from the drop-down menu of the network- manager- applet, since it duplicates the outcome of "disable", and does not work correctly anyway (allows slow traffic to pass through).