Open Systems Interconnection model (OSI model) 7. Application layer - This layer provide the services to the user 6. Presentation layer - it is responsions for translation, compressions encryption 5. Session layer - it is used to establish, manage and terminate the sessions 4. Transport layer - it provides reliable massage delivery from process to process. 3. Network layer - it is responsible for moving the packets feom source to the destination 2. Data link layer - it is used for error free transfer of data frames 1. Physical layer - it provides a physical medium through which bits are transmitted