- divides [[Networking|Network]] communication into 7 layers ![OSI Model 7 layers - physical, data link, network, transport, session, presentation, application](https://images.ctfassets.net/slt3lc6tev37/6ZH2Etm3LlFHTgmkjLmkxp/59ff240fb3ebdc7794ffaa6e1d69b7c2/osi_model_7_layers.png) - modern [[Networking|Internet]] runs on [[Transmission Control Protocol (TCP)|TCP]]/[[Internet Protocol (IP)|IP]], which combines various layers - does not strictly follow OSI - modern protocols blur the lines - OSI is more used for conceptual troubleshooting, rather than actual implementation ![[Pasted image 20260807215550.png]] https://bytebytego.com/guides/what-is-osi-model/ https://www.cloudflare.com/learning/ddos/glossary/open-systems-interconnection-model-osi/?__readwiseLocation=