The OSI Model
A Comprehensive Overview of the Seven Layers and Their Protocols
USHA MARTIN UNIVERSITY, RANCHI
Presented by
Jitu Kumar
Guided by
Dr. Ajay Kumar
Faculty of Engineering & Applied Sciences 05 - 2024 1
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COMPUTER NETWORK : PPT ABOUT OSI MODEL, Slides of Computer Networks
COMPUTER NETWORK : A POWER POINT PRESENTATION ON OSI MODEL
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The OSI Model
A Comprehensive Overview of the Seven Layers and Their Protocols
USHA MARTIN UNIVERSITY, RANCHI
Presented by
Jitu Kumar
Guided by
Dr. Ajay Kumar
Faculty of Engineering & Applied Sciences
05 - 2024
CONTENTS
1. Introduction
2. Why Learn the OSI Model?
3. The Seven Layers Overview
4. Layer 1 - Physical Layer
5. Layer 2 - Data Link Layer
6. Layer 3 - Network Layer
7. Layer 4: Transport Layer
8. Layer 5: Session Layer
9. Layer 6: Presentation Layer
10.Layer 7: Application Layer
11.Conclusion
12.Questions and Discussion
Why Learn the OSI Model? o (^) Facilitates troubleshooting by isolating network issues at the corresponding layer. o (^) Helps in designing flexible, interoperable networks. o (^) Each layer has distinct responsibilities, ensuring that networks are manageable and organized.
The Seven Layers Overview
Layer 2 – Data Link Layer o (^) This layer is responsible for the error-free transfer of data frames. o (^) It defines the format of the data on the network. o (^) It provides a reliable and effi cient communication between two or more devices. o (^) It is mainly responsible for the unique identification of each device that resides on a local network. Protocols/Technologies: Ethernet, PPP (Point-to-Point Protocol), MAC (Media Access Control), Switches.
Layer 3 – Network Layer o (^) It is a layer 3 that manages device addressing, tracks the location of devices on the network. o (^) It determines the best path to move data from source to the destination based on the network conditions, the priority of service, and other factors. o (^) The Network layer is responsible for routing and forwarding the packets. Protocols/Technologies: IP (Internet Protocol), ICMP (Internet Control Message Protocol), Routers.
Layer 5 – Session Layer o (^) The Session layer is used to establish, maintain and synchronizes the interaction between communicating devices. o (^) Session layer acts as a dialog controller that creates a dialog between two processes. o (^) Session layer adds some checkpoints when transmitting the data in a sequence. Protocols/Technologies: NetBIOS, RPC (Remote Procedure Call).
Layer 6 – Presentation Layer o (^) It acts as a data translator for a network. o (^) Translates network data into a format that the application layer can accept. o (^) Handles data encryption, compression, and translation services. Protocols/Technologies: SSL (Secure Sockets Layer), TLS (Transport Layer Security).
CONCLUSION o (^) We've explored the OSI Model's seven layers, from the Physical Layer, which handles raw data transmission, to the Application Layer, which interfaces with user applications. o (^) Each layer has distinct responsibilities that ensure effi cient and secure data flow across the network.
Questions and Discussion