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by treve
663 days ago
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The OSI model hasn't been accurate representation of ip networking since pretty much day 1. It was made specifically for a different protocol, but in the stack we use today some layers are better split up in 2, some protocols exists in multiple layers. It's a nice metaphor but I think it's time to drop it! https://computer.rip/2021-03-27-the-actual-osi-model.html |
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I don't know if it's missing in people's course work or what, but I've had to use http://www.tcpipguide.com/free/diagrams/ipencap.png many a times to explain how stuff like VPNs work, correct statements like "firewalls don't have a routing table, firewalling is layer 4", explain things like MTU and payload size, or why certain traffic doesn't go beyond a broadcast segment normally.
Personally I think this is one of the better visualizations.