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Open Systems Interconnection (OSI) Model
The OSI model offers a framework for understanding network design concepts. Many popular network technologies today take some design elements from the OSI model. Many entry-level network certification programs also require knowledge of OSI.
Short Overview of the OSI Model
The OSI model defines internetworking in terms of a vertical stack of seven layers. This page briefly explains the basic structure of the OSI model.
OSI Model Tutorial
The OSI model provides a good conceptual framework for understanding the implementation of network protocol and services design. As presented in this in-depth tutorial, the design of many modern network technologies follows the OSI model to some extent.
OSI Model Q&A
This interactive "quiz" presents a series of common questions and answers related to the OSI model.
Visual Guide to the OSI Model
Individual layers of the OSI model are illustrated visually to concisely explain the key aspects of the architecture.