IEEE 802.3, the ethernet working group, defines FEC for many media types. While Ethernet frames do not themselves contain forward error correction, in many cases they are encoded with FEC before they hit the line. This is required by spec for most long low speed and all high speed links. You couldn’t get any frames through without it.

Can you expand on this? Which massager? how is it attached? seems like noise could be an issue depending on how it's attached?

If you're using bash you don't need single quotes:

  rg -g*.l foo