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Your OSI model image is weird af: an ethernet cable is also layer one (iee 803.x, so is a coax line), dunno why you have it labeled like that, just confuses people.
If you meant ethernet protocol, thats a completely different thing, and you never labeled it as such.
It's also worth mentioning that sockets aren't a real layer, because they're just an API at the OS level (they're an abstraction to let application developers use TCP/UDP/etc.). ALSO, in some interpretations, everything above Layer 4 is debatably just the application layer. There's not necessarily a clean separation between the presentation layer and "application layer" in all applications. That said, the 7 layer model is still useful as a teaching too, but knowing these extra details will give you a more complete understanding (and be less confusing).