A device in a network that forwards data packets is known as a router. Routers are critical for connecting multiple networks and directing internet traffic between them. By analyzing the packet's destination address, the router determines the most efficient path for data transmission, ensuring that information reaches its target promptly. They play a vital role in home and business networks, often providing functionalities like firewall protection and network management. Routers facilitate communication between devices and the internet, making them essential components of modern connectivity.