OSI Model Analogy
The OSI model is the model developed for computer-to-computer communications over a network. This model breaks down all the functions that occur into seven distinct layers. These layers are, application, presentation, session, transport, network, data link, and the physical layer. Each one encompasses a specific part of the process that occurs during the communication.
In order to simplify this think of it like sending a package through the post office. It can be broken down into seven stages or layers for this example. We start with bringing an item or letter to the post office that is to be sent to a determined destination. This is essentially what happens in the application layer. This is the interface between the communication and the entire process as it is in how a computer works. Next the item is packaged and put into a box or envelope. This is similar to how the presentation layer functions. In this layer the communication is formatted, encrypted, and compressed; basically prepared for sending. Our package is then tagged with tracking information and tagging information that allows us to track it and verify if there are any other packages and if needed what order they go in. This is similar to the session layer. Next our package is put into a sorting device of some kind that sorts things based on size to see if it is able to be sent with other shipments or broken down to be sent different ways if it is to large. This is similar to the transport layer of the OSI model.
The similarities go on over the next few layers as well. After packages are sorted they couriers inspect the packages and are given the specific routes they are to take in order to deliver the correct packages to the correct recipients. This represents the network layer in that the connections are established between the computers and the routing is also established. Next the packages are loaded onto the means of their...
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