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IBM b-type Data Center Networking: Design and Best Practices Introduction by Steven Tong, Sebastian Oglaza, Michal Holenia, Norman Bogard, Jon Tate

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Networking introduction
In this chapter we introduce the OSI 7-layer communications model and take a look at the protocols used at each layer. This chapter provides an overview of selected technologies that are in use in today’s networks.
3.1 Brief network history
In this section we take a brief look at the history of computer networking and then move on to the current industry best practice. The early concepts of networking create the foundation to truly understanding the reason for changes in network equipment.
As we probably all know, computers ...

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