OSI_Reference_Model_PresentatioOOOn.pptx

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1. OSI Reference Model An Overview of the 7 Layers

2. Introduction to OSI Model The OSI (Open Systems Interconnection) Model is a conceptual framework used to understand network interactions. It standardizes communications into 7 layers, each with specific functions.

3. Layer 1: Physical Layer The Physical Layer deals with the hardware and transmission of raw data over a physical medium, such as cables or radio frequencies.

4. Layer 2: Data Link Layer The Data Link Layer is responsible for data transfer between adjacent network nodes and error detection/correction. Protocols like Ethernet operate here.

5. Layer 3: Network Layer The Network Layer is responsible for routing, switching, and addressing data packets across networks. Protocols like IP operate at this layer.

6. Layer 4: Transport Layer The Transport Layer ensures reliable data transfer through error recovery and flow control. TCP and UDP are protocols at this layer.

7. Layer 5: Session Layer The Session Layer manages and controls connections between devices, ensuring data exchange sessions are established, maintained, and terminated.

8. Layer 6: Presentation Layer The Presentation Layer translates data between the application layer and the network, ensuring proper data formatting, encryption, and compression.

9. Layer 7: Application Layer The Application Layer is the closest to the user, enabling interaction with the network through applications like web browsers, email clients, and file transfer protocols.

10. Conclusion The OSI Model provides a framework for understanding the functions of networking hardware and software, ensuring interoperable communications across diverse systems.