OSI Model this seven features and works.pptx

Osi model

1. OSI Model Mohd Zafar Shaikh

2. What is the OSI Model The OSI (Open Systems Interconnection) Model is a conceptual framework used to understand and standardize the functions of a telecommunication or computing system. Developed by the International Organization for Standardization (ISO) in 1984. It divides the communication process into seven distinct layers. Why is the OSI Model Important? Provides a universal language for networking. Helps in troubleshooting network issues by isolating problems to specific layers. Facilitates interoperability between different vendors and technologies. Plays a crucial role in network design and understanding.

3. The Seven Layers of the OSI Model Layer 1: Physical Layer Layer 2: Data Link Layer Layer 3: Network Layer Layer 4: Transport Layer Layer 5: Session Layer Layer 6: Presentation Layer Layer 7: Application Layer

4. Layer 1: Physical Layer Deals with the physical connection between devices. Handles the transmission and reception of raw data streams over a physical medium. Examples: Ethernet cables, hubs, and repeaters. Layer 2: Data Link Layer Responsible for node-to-node data transfer. Examples: MAC addresses, switches, and bridges. Manages error detection and correction from the physical layer. Layer 3: Network Layer Manages data routing and forwarding. Responsible for logical addressing (e.g., IP addresses). Examples: Routers, IP protocol.

5. Layer 4: Transport Layer Ensures complete data transfer with error checking and data flow control. Examples: TCP (Transmission Control Protocol), UDP (User Datagram Protocol). Layer 5: Session Layer Manages sessions or connections between applications. Responsible for establishing, maintaining, and terminating sessions. Example: Managing multiple sessions in a video conference. Layer 6: Presentation Layer Translates data between the application layer and the network format. Handles data encryption, decryption, compression, and translation. Examples: SSL/TLS encryption, data compression algorithms.

6. Layer 7: Application Layer Provides network services directly to applications. Interfaces directly with end-user applications. Examples: HTTP, FTP, SMTP. Real-World Applications How each layer functions in real-world scenarios (e.g., browsing the web, sending an email).