30 years old, but still highly applicable

The OSI (Open Source Interconnection) 7 Layer Model is 30 years old, but still highly applicable. If you don’t know it; read about it and learn it! Or maybe time for a little refresh, even if you already know about it? 🙂

https://learningnetwork.cisco.com/docs/DOC-15624

http://en.wikipedia.org/wiki/OSI_model

http://www.tcpipguide.com/free/t_HistoryoftheOSIReferenceModel.htm