A network graph displays six named nodes connected by six weighted links, with link thickness proportional to each connection’s weight. Using D3 v4’s force layout (`d3.layout.force`) and SVG rendering, the visualization positions nodes through simulated gravity, charge, and distance parameters. Node circles are blue with labels, and the layout updates continuously during the `tick` event to animate the graph. Data comes from a local `data.json` file containing node names, group assignments, and link weight values.