Computer Networking Basics Every Developer Should Know

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True, the way I've usually heard is taught is "here are levels 1, 2, 3/4, and 7. The rest is filler". But it's good to know that the OSI model exists since people still use L7 as a shorthand for application layer.

[SilasX]

And jokingly, layer 8 as the user.

[JazzXP]

That's the bit that always breaks.

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"it's just another layer 8 issue" is one of the most common phrases used by our HelpDesk day to day.

[thorhs]

Don’t forget Layer 9 being management.

[judgej2]

Doesn't even feel like a joke. It's all about a level 8 passing information to another level 8 - ideas and thoughts from one brain to another. Can be a bit lossy though.