What stores internal tables used for routing traffic across various networks globally?

The correct choice for the question about which device stores internal tables used for routing traffic across various networks globally is a router. Routers play a critical role in networking by directing data packets between different networks. They maintain routing tables that contain information about the paths to different network destinations. This allows routers to efficiently determine the best route for incoming data packets, ensuring that the data reaches its intended destination by analyzing the network traffic and the conditions of connections available.

Switches primarily operate within a local area network (LAN) and are focused on directing data packets between devices on the same network segment rather than managing traffic across multiple networks. Hubs are simple devices that do not make intelligent routing decisions; they broadcast incoming data to all ports without regard for the destination. Gateways facilitate communication between different networks that may use different protocols but do not primarily focus on routing data like routers do. Therefore, the unique function of routers in managing and storing routing tables is what makes them the correct answer in this context.