(Presentation and Session are currently taught in terms of CSS and cookies in HTML and HTTP, respectively. When the web stack became Officially Part of the Officiously Official Network Stack is quite beyond me, and rather implies that you must confound the Web and the Internet in order to get the Correct Layering.)
https://computer.rip/2021-03-27-the-actual-osi-model.html - The Actual OSI Model
> I have said before that I believe that teaching modern students the OSI model as an approach to networking is a fundamental mistake that makes the concepts less clear rather than more. The major reason for this is simple: the OSI model was prescriptive of a specific network stack designed alongside it, and that network stack is not the one we use today. In fact, the TCP/IP stack we use today was intentionally designed differently from the OSI model for practical reasons.
> The OSI model is not some "ideal" model of networking, it is not a "gold standard" or even a "useful reference." It's the architecture of a specific network stack that failed to gain significant real-world adoption.