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OSI Reference Model, 1st Ed.
The Open Systems Interconnection (OSI) model is a cornerstone of network
communications. A thorough understanding of its layers and functioning is
important for any internetworking professional. This tutorial presents a
model overview and discusses:
The seven elements (layers) of communications
The functions that happen at each layer of the model
Communications within, and between, layers
How network adapters, hubs, switches, and routers function within
the model
Preparing data for transmission between devices at the same layer,
and at different layers.
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