general:  overall traffic in/out/through
general:  average traffic in/out/through (per day, week, month)
general:  total/in/out/through for each network interface
general:  packet size min/avg/max
protocol: sum of all "others"
protocol: calculate in/out/through for each protocol

new sections:
list of top 20 hosts in/out (when found a fast algorithm for this task)
list of well-known ports (20, 21, 23, 25, 80, 110, ..., 5000) traffic in/out
