What certifications pay the most?

The OSI model is included in the computer software systems within the computers. The main function with the OSI model involves communication. This model contains many layers that perform certain functions. With these layers, each layer assists the layer that is above it. This helps with the communication process involved in this computing system.

The layers from first to seventh include the physical layer, data link layer, network layer, transport layer, session layer, presentation layer and the application layer. The network layer is responsible for operating the filtration of the firewall. A firewall is used to prevent unwanted data and information from coming into your computer and computer systems. The network system is responsible for that function because it moves the data sequences from one place to another.