No confirmation is available, but this may explain why this service generates as much traffic as it does. Preliminary analysis suggests that this remaining traffic consists of a large number of very small transmissions. Also unresolved is the unexpected peaks in traffic in the late evening. Since these peak features appear in the known applications as well as in the unresolved category, it is clear that these peaks are not caused by one application. Yet, they do not correspond to any obvious user-driven activity.
Further investigation is ongoing.