Benefits of the OSI Model
OSI model, to understand it first it is needed to confirm the direction in which data travels. Normally, the data travels from the top layer (application layer), accesses and then crosses the network, and finally reaches the network destination. This process is called encapsulation. If you are in the destination end, data travels from the physical layer and moves up to pass the data to the appropriate application on the other end. Thus, the data travels from the bottom layer. This process is called un-encapsulation.
It is important to understand the logical order of use of the OSI model. We start with the application layer, from where the application data passes down through the various elements that make up the OSI model. The OSI model was not designed as an actual component that makes network communication occur rather it is designed as a model for vendors to design various elements that allow internet working to function with different vendors.
Benefits of OSI Model
The OSI model allowed different vendors to work together to develop an ultimate solution. It is going to break the overall complexities of networking into smaller pieces, which can easily be utilized by various vendors. By allowing a vendor to make changes at one layer without affecting other layers, you can have the vendor focus only on certain things like network protocols, LAN technologies, cabling or applications. This would allow the vendors to change one portion of the solution and not affect the other layers that are involved in network communication. The primary task of the OSI model is to facilitate standardization.
The advantage of being familiar, with different layers and the devices operated in these various layers is that it eases the process of troubleshooting. When we know that we have an issue, with a network card, it only involves certain layers where the network card actually is. We have the physical layer which is the physical element of the network card where the cable is plugged into. Then, we also have the device driver and protocols which allow us to break up the complexity of troubleshooting into smaller layers. This helps address each one individually and thus effectively solve the problem thereby making the OSI model beneficial to nonworking.
There are two different parts in the OSI model. There is the upper layer (layer 5 to layer 7). Upper layers are used primarily by applications that provide solutions to specific routine types. Then, we have the lower layers (layer 4 to layer 1). Lower layers are primarily focused on network protocols and communications, media, the actual bit transfer, binary bits from one end to the other end, and so on. The OSI model can be dealt with keeping these two different aspects in mind.