The OSI model defines a framework for network communication consisting of 7 layers: physical, data link, network, transport, session, presentation, and application layer. Each layer has a specific function and communicates with its corresponding layer in another computer through defined protocols. The OSI model aims to guide network engineers and developers in building robust and interoperable networks and applications.

1. OSI MODEL
Computer Networks
Lesson 3
Pranab Bandhu Nath
Senior Lecturer
CSE Department
City University, Dhaka
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2. OSI Model
Sender Receiver
Open Systems Interconnection
PD NT SPA

5. Do You Have Any Questions?