The OSI model remains a fundamental concept in networking, despite being considered "dated" by some. It's essential for understanding how data travels through the network, and its relevance is highlighted by the increasing importance of eBPF (extended Berkeley Packet Filters) technology. The OSI model's 7 layers provide a framework for troubleshooting, securing infrastructure, and setting up new technologies like eBPF. By understanding how data flows through the network, professionals can pinpoint areas to focus on and make informed decisions.

Source: https://dev.to/xwindwolf/lets-get-into-the-weeds-the-osi-model-and-why-it-still-matters-35f3