[fanf2]

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 :-)

[asveikau]

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.