RFC1149: Ten Years of In-Flight Internet https://nxdomain.no/~peter/rfc1149_ten_years_of_in-flight_internet.html

Yes, there was an implementation. In April 2001, my laptop was pinged via carrier pigeon.

My writeup for the 10th anniversary of the experiment, with links to copies of the original material. #rfc1149 #pigenons #networking #hacking