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Showing posts from November, 2019

OSI MODEL

OSI Model o     OSI stands for  Open System Interconnection  is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer. o     OSI consists of seven layers, and each layer performs a particular network function. o     OSI model was developed by the International Organization for Standardization (ISO) in 1984, and it is now considered as an architectural model for the inter-computer communications. o     OSI model divides the whole task into seven smaller and manageable tasks. Each layer is assigned a particular task. o     Each layer is self-contained, so that task assigned to each layer can be performed independently. Characteristics of OSI Model: o     The OSI model is divided into two layers: upper laye...