A WAN Router serves as a critical hardware device that connects multiple locations or subnets over a larger geographical area, enabling seamless data communication between them. It operates at the network layer, utilizing routing tables and protocols to determine the most efficient path for data packets. WAN Routers are essential for providing robust internet access and secure data transmission between enterprises and the Internet, or between different ISP networks. Suitable for both large-scale corporate networks and smaller business environments, WAN Routers offer advanced features such as firewall protection, VPN support, and traffic management to ensure optimal network performance and security.