What type of traffic is "net control packets"?
Only Trend Micro knows for sure. The traffic in this category matches two of their traffic categories, 9 and 20:
Code:
9,Network Management
20,Network Protocols
My guess is, these are TCP packets (SYN, ACK, etc...) and ICMP. Possibly other types as well, but there is no way to know what these two generic categories are.
2. Would it be possible to rather sort the columns on the right by data usage? So most used is on top and least at the bottom?
Doing so means you would lose the priority information. Traffic is currently shown by priority, starting from the highest. This is the display that makes the most sense, since it's a legend for the chart (generated by the chart itself), not an independent list.