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Designing Wide Area Networks and Internetworks: A Practical Guide by J. Scott Marcus

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6. Selecting Transmission Technologies

One of your first tasks in phase 2, preliminary design, is to select from among a wide variety of candidate transmission technologies—primarily those operating at levels 1 and 2, the physical and data link layers, of the OSI Reference Model.1 In the days before internetworking, this choice had a truly fundamental impact on your network design. It would percolate outward to every corner of the network and would color every other decision.

1. H. Zimmerman, “The OSI Reference Model—The ISO Model of Architecture for Open Systems Interconnection,” IEEE Transaction on Communications, April 1980.

In a modern internetwork, the selection of transmission technologies is still important, but it no longer represents ...

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