The program's baseline commercial network — the standard core-to-access architecture, VLAN plan, and Wi-Fi design that every later real-project case study in this program deviates from in one specific, named way.
The project brief: a 4-story, roughly 200,000 sq ft corporate headquarters housing about 960 employees, served by a redundant Layer 3 core, two wiring closets per floor, function-based VLANs on a single reserved 10.10.0.0/16 supernet, and building-wide Wi-Fi. This module walks the full physical topology, the VLAN and IP addressing plan (including why the wireless-staff VLAN is deliberately sized a full block larger than raw demand), two worked calculations — access point count checked against both coverage and client capacity, and a PoE power budget for a representative access switch — plus the dual-ISP internet edge and layered redundancy design.
It closes by naming, explicitly, how this project's core-to-access, VLAN-and-addressing architecture is the exact baseline the hospital, manufacturing plant, data center, and university campus projects later in this program each build on. The full worked numbers, bill of materials, and design reasoning are part of the unlocked module below.