> downvoted. Why? Networks have changed a lot since 1983. The only good idea from that model is “you can build a higher-level protocol on top of a lower level

> downvoted. Why? Networks have changed a lot since 1983. The only good idea from that model is “you can build a higher-level protocol on top of a lower level protocol”. Nowadays software ate every level of the OSI model including physical layer, and the idea of composing these layers is kinda obvious because that’s how people design complex software. > has been beneficial in all sorts of ways Having a knowledge of the OSI model has been beneficial to me in only one way, when someone asked me about it on a job interview. > It is still worth understanding the basics of it though. I know the basics, but I think that for younger people the OSI model is mostly useless. There’s modern stuff to demonstrate that principle of composability of protocols, e.g. websocket/http/tls (all of them are based on each other and yet all are on the same OSI level 7).