I configured a NetFlow9 protokol on a firewall port. The network traffic is now beeing shown in PRTG. For a testing purposes I downloaded a zip file from the internet. The file size is 167 MB. But when I looked for this traffic in PRTG, the Top connections showed the traffic amount on port 80 for my IP address of 338 MB. I know these amounts shouldn´t be the same because of the way the sessions work but can the difference be so big (2x the size of downloaded file)?