by Darius Kazemi, May 7 2019

In 2019 I'm reading one RFC a day in chronological order starting from the very first one. More on this project here. There is a table of contents for all my RFC posts.

Missing algorithm

RFC-127 is titled “Comments on RFC 123” authored by Jon Postel of UCLA. It's dated April 20th, 1971.

The technical content

Postel is commenting on the official Initial Connection Protocol submitted by his colleague Crocker in RFC-123. This is not plain-English commentary but rather his timeline/algorithm for what an ICP handshake would look like.


This is a case of Postel filling in what is probably necessary information that was missing from RFC-123.

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About me

I'm Darius Kazemi. I'm an independent technologist and artist. I do a lot of work on the decentralized web with both ActivityPub and the Dat Project. You can support my work via my Patreon.