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Chapter 3: Understanding the OSI Model - Pg. 41

Chapter 3 Understanding the OSI Model The Open Systems Interconnection (OSI) Model is one of the most refer- enced models in networking. It includes seven layers with specific activities, protocols, and devices working on each. Many network exams test your knowl- edge of the different elements of the OSI Model, and even some hiring manag- ers quiz potential network employees on their knowledge. The TCP/IP Model is similar but includes only four layers instead of seven. This chapter introduces both models.