This image above represents the OSI (Open Systems Interconnection) Reference Model, made of 7 distinct layers, each of which is responsible for a specific function. The image visually presents each layer with its data unit and how encapsulation and de-encapsulation work in transmitting and receiving data over a network. The table below contains a detailed explanation of each part.. This tutorial provides an overview of the OSI reference model, detailing the seven layers and the specific functions of each layer with examples.
OSI Model Chart Those who start towards the path of CCNA understand the OSI model as a core component that continues throughout the rest of the Cisco certification tracks. The Open Systems Interconnection model (OSI model) is a seven layer conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system. The physical layer, which is.. The Open Systems Interconnection (OSI) model is a reference model developed by the International Organization for Standardization (ISO) that "provides a common basis for the coordination of standards development for the purpose of systems interconnection." [2] In the OSI reference model, the components of a communication system are distinguished in seven abstraction layers: Physical, Data Link.