The document summarizes the seven layers of the OSI model: 1. The physical layer defines electrical specifications for activating and maintaining physical links. 2. The data link layer provides reliable transmission of data frames across physical links and defines media access control. 3. The network layer provides path selection and logical addressing between hosts across networks. 4. The transport layer segments data streams and handles flow control and reliability between hosts. 5. The session layer establishes and manages dialogues between presentation layers of two hosts. 6. The presentation layer ensures data formats are readable between applications of different systems. 7. The application layer provides network services to user applications like browsers and office programs.

1. OSI Model Presented- by Siddhesh Pawar

2. The Seven Layers of the OSI Model International Organization of Standardization ISO

9. Subdivided Data Link Layer LLC and MAC sublayers

12. Summary of the OSI Model Layer Description

13. Communication Between Two Systems Data transformed through the OSI Model