How to view network traffic requested by a specific app?

There are lots of discussion on how to see which app is requesting network connection. I have tried the following apps: tcapturepacket wifi monitor connection tracker However, none of them was useful. For example, for a short period of time, I uploaded a 30KB pcap file which can be viewed here . Still I haven't find out which app is requesting connection and to where it is trying to connect. I also tried to look at adb logcat, but didn't find useful information. Maybe something has been missed here. Any guess?