TP-Link ER605 is a multi-WAN wired VPN router that up to four gigabit WAN ports. The product is integrated into Omada SDN, Omada's Software Defined Networking (SDN) platform, and includes five gigabit ports. Three of the ports are WAN/LAN ports, and one is a LAN port. The WAN port is used to optimize bandwidth usage. The product also has a built-in DHCP server, which can be used to manage IP address allocation. The router supports multiple VPN protocols, including PPTP, L2TP, and OpenVPN. It also supports active multiple WAN failover between Internet connection sources. The TP-Link ER605 is a powerful, yet easy to use multi-WAN wired VPN router. It's perfect for small businesses or home offices that need to manage and distribute bandwidth among multiple Internet connection sources. The built-in DHCP server is a great feature for managing IP address allocation. The router also supports popular VPN protocols, making it a great choice for those who need to connect to a VPN. The active multiple WAN failover is a great feature for ensuring uninterrupted Internet access.