A force-directed node-link diagram visualizes 200 Bitcoin nodes and their connections, with links drawn as curves that highlight neighbors when hovering over a node. The graph uses d3.forceSimulation with forceLink and forceManyBody to position nodes, while d3.curveBundle generates the curved edge paths. Data is loaded from bitcoin_nodes.csv and bitcoin_edges.csv, rendered as SVG circles and text labels. The interaction filters shown links by applying a CSS highlight class based on source or target matching the hovered node.