An interactive network diagram displays nine named people connected by weighted links, rendered as SVG lines and labeled circles. The visualization uses D3 v4, loaded with both d3.v4.js and an older d3.v2.js, to perform force-directed layout via `d3.layout.force()` with configured gravity, distance, and charge. Links are stroked in purple with widths proportional to link weight, while nodes are draggable circles with yellow text. Positions update on each layout tick, with data sourced from a local `graph.json` file containing node names, groups, and edge weights.