I was really bothered that on the website version, the NTP packet diagram is largely illegible. I hope that when they gave this talk on slides, you could read it.
TBH you aren’t supposed to read it, you either say to yourself, oh yes I recognise the NTP packet diagram; or, oh yes, that looks like a packet diagram; or, oh interesting maybe I should look at the NTP RFC. The slide was only up for a couple of seconds :-)
The thing about a good, simple network protocol is you can look at the packet diagram and start to understand how the protocol works. I think NTP fits the bill here.
