A network graph displays nodes arranged in a circular layout, with links connecting salespersons, products, and regions. The D3.js v7 code positions nodes using trigonometric calculations based on the viewport dimensions, drawing SVG lines for edges. Node labels are placed directly on the chart without force-directed simulation, relying instead on a static circular arrangement. The visualization encodes two node types—salespersons and regions—through color differentiation, while products and connections form the remaining graph structure.