Protocols and Devices

The International Standards Organisation (ISO) defined a seven layer model to standardise networking processes. The Open System Interconnection (OSI) model facilitates the understanding of the complexities of networking by defining what happens at each stage of the process.

Each of the seven layers in the model communicates with the layers above and below; using standardised coding at the beginning of the message that can be interpreted by another device regardless of who made it.

The seven different layers break up the process of networking, making it easier to understand and to troubleshoot problems. It is possible to test the functionabilty of each layer in sequence, to determine where the problem is, and where to begin repairs.