This example presents both a hierarchical tree and an interactive network graph of global internet speeds, sourced from CSV data. The tree visualization uses `d3.tree` and `d3.linkHorizontal` to organize countries by speed classification, while the network graph employs `d3.forceSimulation`, `d3.forceLink`, `d3.forceManyBody`, and `d3.forceCenter` to position country nodes, with drag interactions enabled. Node colors indicate speed classification (green, orange, red), and both visualizations are rendered as SVGs on the same page.