Data center physical access layer evolution
In this chapter, we examine the evolution of the data center physical access layer over the past two decades. A traditional hierarchical network design consists of the following layers:
Access layer
Distribution layer
Core layer
We consider the physical cabling and data center layout, as well as possibilities for the server architecture:
End-of-Row (EoR)
Middle-of-Row (MoR)
Top-of-Rack (ToR)
Finally, we discuss a number of solutions pertaining to the overall network design.
4.1 Introduction to server ...

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