Here’s something I like to occasionally do; run one of my tools against a packet capture to see how it behaves in the wire, does it have a signature in the packet, and if the features work as explained.
The point of the video is to practice packet capture techniques and analysis. I did not doubt that Wireshark and http-ping would have different response time values.
In this video, I compare the http-ping response times to what was on the wire.