There is also TCP traffic

In addition to the UDP traffic there is also TCP traffic being set from the client to the server (c⇒s) and from the server to the client (s⇒c). There is a gap of ~5.196 seconds between bursts of TCP packets. We can also notice in the figures that the length of the TCP segments is larger at the start and the end of the session.

length of the TCP segments sent in each direction versus time — Plot of the TCP client to source packet length versus time and a TCP source to client packet length versus time

Transcript

We also note that in addition to this UDP traffic there is some TCP traffic and we can suspect that is probably control traffic only - as the client to the server traffic the length of those frames the IP packets, and we see the length [of packets] from the server to the client, and we see those lengths as a function of time, and we also notice that the spacing is very very uniform at 5.196 seconds between these TCP bursts. So, some of you were taking a look at the FASP protocol, and I hope you will find further insight but plotting your data varying the parameters and getting your data to talk to you.