[Sephiroth]

With my engineering sort of hat on, I'd look at the effect of the difference in what's connected.It's just before 08:00 that things diverge. If you switched them all off right for two hours (or rather took them off the network) now except for one laptop you're using, that would eleminate unknown traffic from those devices. If that proves right (which it prolly won't) we can take a look at the devices.