other apps? (Score 1)

Could it be that other apps are responsible for the additional internet activity that you can't account for? Nowadays nearly every application you install checks periodically for updates.. itunes, anti virus software etc.. Usually you can disable these periodic checks and do them manually. Another point there are addons such as fasterfox which will download web pages before you actually visit them to make your browsing faster.. worth checking that nothing like this is installed. But of course the biggest culprit is more than likely ads..