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Upgrading and Repairing Networks, Fifth Edition by Mark Edward Soper, Terry W Ogletree

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Appendix A. Overview of the OSI Seven-Layer Networking Reference Model

SOME OF THE MAIN TOPICS IN THIS APPENDIX ARE

It’s Only a Model! 1082

When discussing different network devices or software components of a network, it is common to use, as a reference point, a model that the International Organization for Standardization (ISO) created. The Open Systems Interconnection (OSI) Seven-Layer Networking Reference Model was originally developed as a blueprint for creating the additional network protocols that the ISO developed. However, these protocols were written during a time when a lot of computer horsepower was required to implement them, and they were never widely adopted. Some companies, such as Digital Equipment Corporation’s DECnet, did ...

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