OSI is an entire networking stack designed by committee that died from disuse [1]. The only thing we now remember of it are the functional layers within the pro

OSI is an entire networking stack designed by committee that died from disuse [1]. The only thing we now remember of it are the functional layers within the protocol. For example, people sometimes refer to TCP as a "Layer 4" protocol even though (a) TCP predates the invention of Layer 4 and (b) TCP is a square peg that does not exactly fit into the round hole that is Layer 4. [1] https://en.wikipedia.org/wiki/OSI_model https://en.wikipedia.org/wiki/OSI_model