Building/campus size and network design will determine the distribution and volume of cabling and network domains/zones.
Each comms room or IT space will require very specific working dimensions for installation, maintenance, HVAC(Heating Ventilation Air Conditioning), power / UPS, and associated cable runs.
Albeit your core data MDF(Main Distribution Frame) is often central, the telecommunications MPOE(Main Point of Entry) also factors in to many design and location decisions (especially in 'greenfields' sites).
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