OSI Reference Model illustrated. Open Systems Interconnection ( OSI ) is a standard reference model for communication between two end users in a network. The model is used in developing products and understanding networks. Also see the notes below the figure. OSI divides telecommunication into seven layers. The layers are in two groups. The upper four layers are used whenever a message passes from or to a user. Layer 7: The application layer ...This is the layer at which communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified.
Layer 6: The presentation layer ...This is a layer, usually part of an operating system, that converts incoming and outgoing data from one presentation format to another (for example, from a text stream into a popup window with the newly arrived text). Layer 1: The physical layer ...This layer conveys the bit stream through the network at the electrical and mechanical level. Webopedia: Online Computer Dictionary for Computer and Internet Terms and Definitions. Pagesbydave- JavaScripts, A-Plus & Network-Plus Exam Preps. Albino Blacksheep. Certifications & Exams. LabMice.net: The Windows 2000\2003\XP Resource Center for IT Professionals. New & Notable News Microsoft Ignite 2025 conference coverage Our guide to Microsoft Ignite 2025 has everything you need to know about the annual conference, including live news updates, expert analysis and highlights from last year's show.
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