OSI (Open Systems Interconnection) is a networking suite created by International Standards Organization in the 1980s as a European subject. The OSI model comprises 7 layers through which the communication process is divided and defined into multiple tasks of information movement through the networked computer.

The seven layers that make up the OSI model are: the physical layer for describing the property intent of the diverse communication media, the exchanged signal interpretation and the electrical properties. The second layer is the data link which used for a description of the logical organization in regard to the transmission of data bits on a particular medium. It is used to define the check summing, the framing and the addressing of the Ethernet package; the net layer basically describes the means through which the exchange series on different data links is capable of data delivery amid two nodes in one network.

The OSI model is also inclusive of a transport layer is used for a description of the quality and nature of the data delivered. This layer defines the means with the retransmissions can be applied to ensure efficient data delivery. The session layer plays the role of describing the sequence of the data organization in cases when they are larger than the typical packets which the lower layers handle. This layer is used for pairing a request and a reply packet into an isolated procedure call. The presentation layer describes the transfer of the data syntax.

The most common role of the application layer is generally a description of how work actually gets accomplished, buy it is also capable of implementing the process of the filler system. It guarantees that the end-users are provided with the services and this is inclusive of the electronic messaging, file transfers, the network management and the virtual terminal access. A basic interaction exists between this layer and the user, hence the use of the terminology, Graphic User Interface (GUI) because the provided services are associated to the network communication which guarantees their running ability via the network.

The network services supplied by the application layer to the end users are typically protocols capable of working with the users data. A good example is that in an application of a web browser, this layers protocol HTTP is enabled to package the required data, send it and receive the contents of the web page. The application layer provides and obtains data to ands from the presentation layer respectively.