What is the OSI model?
Learn about what may be the single most important networking concept that helps different systems communicate—the OSI model.
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The OSI reference model is the most basic element of computer networking used commonly as a point of reference by network engineers. Network engineering expert, John Pickard, discusses the role of the OSI model in data encapsulation and de-encapsulation, and identifies the seven layers of the OSI model by name and number, even offering a mnemonic for remembering their correct order.