Very nice. The design reminds me of a website that I forgot to bookmark a long while ago, it was about explaining network protocols at the wire level, and it had some of the most amazing visuals that I ever saw. It's a shame that I forgot what it was, and googling doesn't help. If anyone knows what I'm talking about please share the link.
Let us know if you find that site asking for my kid :)
Looks like it might have been VisualLand.net, which isn't around anymore. Looking at the archive of the site (https://web.archive.org/web/20130811073141/http%3A//www.visu...), most of their animations / diagrams were Flash, so no longer run, and don't seem to work with archive.org's emulator either.
No, that's not it unfortunately. It was a single page with a style of diagrams that shows a high-level format of something, with arrows to a zoomed-in version that details the structure of the fields. I remember its colour scheme being dominated by light blue and green, IIRC.
Could this be it? TLS 1.3 connection, with every field in the packets labelled: https://tls13.xargs.org
No, not that one either. The page was static and full of high quality images dissecting the format structures.
Where the visuals interactive or static?
Static.