This interactive network visualization displays a small social graph with eight named nodes and seven weighted links using a force-directed layout. The code employs D3 version 2’s `d3.layout.force` to simulate physical forces, positioning circles and text labels from a JSON file. Link stroke widths correspond to the `weight` property, while nodes render as gray SVG circles with draggable behavior. The example demonstrates basic D3 force layout techniques, including tick updates for continuous position adjustments and drag interactions.