Layers of the OSI Model: The First two Layers are Explained.

First Layers of the OSI Model

1. From Bits to Bytes Exploring the OSI Model's Role in Seamless Data Transmission Welcome to this self-paced learning module on the OSI Model. This course will guide you through the workings of network communication, enhancing your understanding of this fundamental framework. by Kurt Peters Click Next to Continue

2. Course Overview What is the OSI Model? The OSI (Open Systems Interconnection) model is a conceptual framework used to understand network interactions in seven distinct layers. Why is it Important? It provides a universal language for network communications, enabling interoperability between diverse systems and technologies. What You'll Learn You'll explore each layer's function, how they interact, and their real-world applications in modern networking.

3. Learning Outcomes Analyse Network Communications Break down complex network processes into distinct OSI layers. Enhance Network Security Identify potential vulnerabilities at each layer of the OSI model. Troubleshoot Effectively Pinpoint issues in network communication using the OSI framework. Design Robust Networks Apply OSI principles to create efficient and scalable network architectures.

4. Layer 1: Physical Layer Function Transmits raw bit stream over physical medium. Components Includes cables, switches, and network interface cards. Protocols Ethernet, USB, Bluetooth operate at this layer. Importance Establishes the physical connection necessary for all higher-level communications.

5. Layer 2: Data Link Layer Frame Creation Data is packaged into frames with header and trailer. MAC Addressing Unique identifiers assigned to network interfaces for local communication. Error Detection Checks for and handles transmission errors in received frames. Flow Control Manages data transmission rate to prevent overwhelming receivers.

6. Upper Layers Overview Network Layer (3) Handles logical addressing and routing between different networks. Transport Layer (4) Ensures reliable data transfer and manages end-to-end connections. Session Layer (5) Establishes, manages, and terminates sessions between applications. Presentation Layer (6) Formats and encrypts data for the application layer. Application Layer (7) Provides network services directly to end-users or applications.

7. Summary & Next Steps Key Takeaways The OSI model provides a structured approach to understanding network communications across seven layers. Further Learning Explore each layer in depth through practical exercises and real-world case studies. Recommended Resources Check out "Computer Networks" by Andrew S. Tanenbaum for an in-depth exploration of networking concepts. Apply Your Knowledge Start analysing your own network setup using the OSI model as a reference framework. References Bora, G., Bora, S., Singh, S., & Arsalan, M. (2014). OSI Reference Model: An Overview. International Journal of Computer Trends and Technology, 7(4). Retrieved from http://www.ijcttjournal.org Howser, G. (2020). The OSI Seven Layer Model. Computer Networks and the Internet, 7–32. doi : 10.1007/978-3-030-34496-2_2 Linington , P. F. (1983). PROGRESS ON THE NETWORK LAYER OF THE OSI REFERENCE MODEL. AFIPS Conference Proceedings, 52, 631–638. doi : 10.1145/1500676.1500752 Mathew, J. C. (2020). Review on Architecture of Computer Networks. International Journal of Psychosocial Rehabilitation, 24(4), 6997–7001. doi : 10.37200/ ijpr /v24i5/pr2020702 Tadimety , P. R. (2015). The OSI Model—Division of Labor. OSPF: A Network Routing Protocol, 13–16. doi : 10.1007/978-1-4842-1410-7_4 End