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OSI Model

The Open Systems Interconnection (OSI) model is a classic seven-layer conceptual framework used for teaching network communications. From the physical signals at the bottom to the user software at the top, its seven layers are Physical, Data Link, Network, Transport, Session, Presentation, and Application.

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Updated 2026-09-06

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Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor

Ch.1 Networking Fundamentals and Architecture - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor

Layered Models and Encapsulation - Anatomy of the Internet: Core Protocols and Packet Delivery @ University of Michigan - Ann Arbor