CNW - OSI Model (Lesson)

OSI Model

Introduction

The OSI Model was developed by the International Organization of Standardization (ISO) in 1978. The model divides the tasks involved in moving data from one system to another into seven distinct layers. Each layer serves a specific function and communicates with the layers directly above and below it.

OSI Model Video

OSI Model Hotspot

Mnemonic Device

A mnemonic device is a learning technique that aids in the retention and retrieval of information in memory. It often involves associating complex information with a simple, memorable phrase, acronym, song, or visual image. The purpose of a mnemonic is to make information easier to remember by leveraging the human brain's preference for patterned and meaningful data. Mnemonics are widely used in education and training to help students and professionals memorize facts, sequences, rules, and various other types of information. Here are 3 mnemonic devices to help you remember the OSI model layers:

• A Penguin Said That Nobody Drinks Pepsi
• All People Seem To Need Data Processing
• Please Do Not Throw Sausage Pizza Away

If those don’t appeal to you make one that helps you remember the layers of the OSI model.

Layers Flashcards

Reflection and Wrap-up

The OSI model is fundamental in understanding network architecture because it provides a universal set of guidelines for designing and implementing network protocols that can communicate and work together. It helps in troubleshooting network problems by allowing network administrators to isolate issues to a specific OSI layer. While not all networks strictly adhere to the OSI model, the concepts and layering principles of the OSI model are widely applied in understanding and designing network systems.

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