That&#x27;s still the beautiful model you&#x27;re referencing, not the reality of networking. If you saw what the actual network devices in the stack were doing, you would be... less impressed by the beauty, let&#x27;s say. But they work, and they&#x27;re fast. That has beauty of its own.<p>And I mean real network hardware through which the packets your received these words are, too, not just abstract theoretical &quot;somebody&#x27;s got something somewhere that does something weird&quot;. The model hasn&#x27;t been accurate since before it was created.