Osi Reference Model Diagram. The upper layers of the osi model diagram like the one posted above represent software that implements network services like encryption and connection management. The osi model open systems interconnection model is a conceptual framework used to describe the functions of a networking system.
The osi seven layer model as shown in figure 41 the osi reference model is built bottom to top in the. The osi has seven layers while the tcpip has four layers. It deals with the means of connecting two nodes in a network.
It provided the first framework governing how information should be sent across a network.
The first layer to deal entirely in software the purpose of the network layer is to direct network traffic to a destination node whos physical address is not known. Introduction to osi model osi model is based on the proposal developed by the international standards organization iso. It provided the first framework governing how information should be sent across a network. Diagrammatically it looks that the 4 layers of the tcpip model exactly fit the 7 layers of the osi model but this is not reality.