When choosing a cable, consider the "Category" (Cat) which determines the maximum speed and frequency:
Newegg, B&H Photo Video, and Monoprice are highly regarded for their technical specs and reliable "bare copper" cable construction. Ethernet Cable Comparison
Retailers like The Home Depot often carry ethernet cables in their electrical or networking aisles, sometimes even offering specialized versions for outdoor or in-wall use. Online Shopping Options
Best Buy stocks a wide variety of "Best Buy Essentials" and brand-name cables, offering same-day in-store pickup for common needs.