This example visualizes a hierarchical dataset of network infrastructure using a sunburst diagram. Each ring represents a level in the hierarchy, from geographic regions down to individual server racks, with arc lengths proportional to the value counts. The visualization is built with D3 v5 and React, using `d3.partition()` to compute the layout and `d3.arc()` to generate the SVG paths. Colors are assigned per top-level branch via `d3.scaleOrdinal` and `d3.interpolateRainbow`, with labels shown for larger segments. The data is loaded from a JSON file and rendered into an SVG element.