The Open Systems Interconnection (OSI) Model

The OSI layer model will help us to understand the overall picture of how computer networks work without getting into too many low-level details.

Common Models

There are several models along which computer networks are organized. The two most common ones are the Open Systems Interconnection (OSI) model and the Transmission Control Protocol/Internet Protocol (TCP/IP) model.

We will discuss each model and the differences between the two in detail starting with the OSI model.

The OSI Model

The OSI Model was developed in the '70s by the Organization for Standardization (ISO). At this time, the Internet was in its infancy and its protocols had not fully matured. The OSI model provides a standard for different computer systems to be able to communicate with each other.

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