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OSI
Layers Model
Application Layer
This brings us to the seventh and final layer, the
application layer. It allows applications access to network
services, such as file and printer sharing, as well as file
transfer and management services. This would be the layer
that a programmer uses to allow his application to access a
network service, such as linking into a database.
Although this explains the flow of data and what processes
are performed by each layer starting with the physical layer
and working to the top, or application, layer, the process
would be the same, only reversed, for data flowing from the
application layer and down to the bottom, or the physical
layer.
Conclusion
By
adhering to this standard model of communications, modern
networks, including the Internet, have come into existence.
For anyone interested in implementing and supporting today's
modern networks, an understanding of the OSI model and its
various layers is crucial. Indeed, this standard of
communications lays the foundation for all of today's modern
network hardware and software.
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