OSI Model . Introduction If you are in the field of networking or you are curious to learn about networking you have heard the term OSI( Open Systems Interconnection ) model. So the OSI model is a reference model which explains how a network works dividing it by seven layers, which we are going to study now. The seven layers of the OSI model. Seven layers of the OSI model[/caption] 1. Physical layer. In the physical layer, there are all the physical connections between the networking devices. Usually, the major problems in networking come here like damaged cables, unplug switches, and many other physical problems. 2. Data link layer. The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network. 3. Network layer. The network layer is responsible for packet forwarding including routing through intermediate routers. Data is transferred in the form of packets via
