by Darius Kazemi, May 4 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.

Found a typo

RFC-124 is titled “Typographical Error in RFC 107” and is authored by John Melvin of the Network Information Center on April 19th, 1971.

The technical content

This document reports an error in RFC-107. On page 7, an “RTS” should be an “STR”. Curiously, this error is not present in the current version of RFC-107 that is on file! This suggests that it was corrected at some point and then entered into the permanent record that we have today.


Amusingly, this correction contains two errors in it! “Catagories” is a misspelling, and it says it updates RFC-106, when in fact it updates RFC-107 as in the title!

Further reading

The RFC Editors keep a record of every error in every RFC in their Errata. This is because RFCs are considered permanent once published, so you can't go back and edit them, you can only provide error reports.

I have, in fact, filed an Errata report for this early Errata.

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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.