What is the difference between AirPrint, Bonjour and Rendezvous? While know what AirPrint does, I am confused about what it is. It claims to be a bunch of technology standards used together such as mDNS, IPP and multicasting. However, the term Bonjour is also thrown around as well, which also appears to be based on the same technologies. What makes it even more confusing is that Bonjour is just a rebrand of Rendezvous.
Is AirPrint a rebrand of Bonjour, the same way Bonjour is a rebrand of Rendezvous, or is AirPrint distinct from Bonjour?
First Rendezvous = Bonjour = unicast DNS
I forget why the name changed from Rendezvous, something about what Apple (used to) call it and what everyone else called it. It’s a server less DNS solution so devices can query locally, self-assemble, and discover services without needing a pre-configured DNS server / database.

https://en.wikipedia.org/wiki/Multicast_DNS
http://www.multicastdns.org/

AirPrint is a standard Wireless Printing protocol so that diverse printers all look like a standard printer, eliminating the need for specific drivers for specific printers. In the same way that LPR (Line Printer Protocol)is a printing protocol as well as IPP (Internet Printing Protocol). Here’s some Apple support / marketing information:

https://support.apple.com/en-us/HT201311 (AirPrint specifics)
https://support.apple.com/guide/deployment-reference-ios/intro-to-bonjour-apd0401947ff/web (Bonjour DNS)

Per wikipedia: &quot;AirPrint is based on mDNS (Bonjour, more specifically) and Internet Printing Protocol (IPP).&quot;(https://en.wikipedia.org/wiki/List_of_printing_protocols#Wireless_protocols)