Do you really need to know about the Open Systems Interconnection (OSI) Model? And what is it anyway?
The first question is easy. Unless you are applying for work in the Information Technologies (IT) field, you don’t need detailed knowledge of the OSI model. And even then it is questionable how much you actually need to know, or will ever use.
As to what it is, the OSI model is a theoretical model of how network communication between computers work, that was never implemented in its entirety anywhere outside of a lab environment. It is mainly used as a reference for system design, for teaching networking concepts, or as a source for questions during IT job interviews.
I should note that there are some OSI terms that have seen common adoption that you will want to be aware of. (more…)