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You're missing the point. Yes, understanding the different layers involved in a network is important. But the OSI model is the wrong way to explain those layers
by duskwuff 6y ago
You're missing the point. Yes, understanding the different layers involved in a network is important. But the OSI model is the wrong way to explain those layers, because it's a different network/software architecture from the one which was implemented in the Internet. The "blurriness" you're referring to in layers 4-7 is literally because those layers are describing software which was never written.
- walrus01 6y agoOh, absolutely agree on that, trying to actually make the OSI model as it was intended a real thing in real life would be an utter exercise in futility. I was thinking purely of how the OSI model concepts can be mapped to things we have built and use now on LANs and WANs, as an educational/mental model concept.
- Mauricebranagh 6y agoThere where full x.400 based systems that did use all the layers - I worked as third line support on the UK ADMD back in the day.