Part I-2. THE OPEN SYSTEMS INTERCONNECTION (OSI) REFERENCE MODEL
Models are useful because they help us understand difficult concepts and complicated systems. When it comes to networking, there are several models that are used to explain the roles played by various technologies and how they interact. Of these, the most popular and commonly used is the Open Systems Interconnection (OSI) Reference Model. The OSI Reference Model makes it easier for networks to be analyzed, designed, built, and rearranged, by allowing them to be considered as modular pieces that interact in predictable ways, rather than enormous, complex monoliths.
You'll find that it's nearly impossible to read a lot about networking without encountering ...
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