As for the other April Fools' Day RFC, No. 6592, there's nothing to see here: It's about . Our translator explains: "a null packet does not exist (it is zero length). The RFC is written as if a zero length packet can be encrypted, transmitted, etc."
Wikipedia includes , which it shows began in 1978 though have been regularly pumped out since 1998.
in Network World's LAN & WAN section.