Question: INSTRUCTIONS Answer should be in text form Editable Not in image form . And not be pilgrimage 1. What is the OSI reference model? Draw

INSTRUCTIONS Answer should be in text form Editable Not in image

INSTRUCTIONS Answer should be in text form Editable Not in image form . And not be pilgrimage 1. What is the OSI reference model? Draw the diagram and explain its each layer 2. What is the difference between Hub, Switch, and Router? 3. Explain the difference between TCP and UDP 4. What is DNS and why a network need it 5. What are IP classes and how can you identify the IP class of given an IP address

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