I am new to the community, and need some advice. I have been looking network types and understand them as they are presented in the displayed context, but am having trouble visualizing the 3 tier model and how they would look incorporated into a floor plan. Particularly if the network has multiple buildings. I will attach a picture of the 3 tiers, but my questions are 1) would the spacing between devices in the distribution layer be the separate buildings? 2) If there are 3 buildings would the core physically reside in the data center? If I am totally of base here can anyone steer me towards some specific literature, or even better, visuals?