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What is the difference between physical connection (Physical topology) and logical connection (Logical topology)? Why are both necessary? Why do we need the Seven-Layer OSI model? What will happen If we don’t have it? Why do we need official standards for copper cable and fiber-optic cable? What happens without the standard?  please answer in the simplest way as possible

What is the difference between physical connection (Physical topology) and logical connection (Logical topology)? Why are both necessary? Why do we need the Seven-Layer OSI model? What will happen If we don’t have it? Why do we need official standards for copper cable and fiber-optic cable? What happens without the standard?  please answer in the simplest way as possible

Systems Architecture
Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter8: Data And Network Communication Technology
Section: Chapter Questions
Problem 12RQ
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What is the difference between physical connection (Physical topology) and logical connection (Logical topology)? Why are both necessary?

Why do we need the Seven-Layer OSI model? What will happen If we don’t have it?

Why do we need official standards for copper cable and fiber-optic cable? What happens without the standard? 

please answer in the simplest way as possible

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