A:Answer The single 2.5Gb port is either/or configurable, so you can use it either to connect the router to your desktop NIC or to your WAN interface, but not both. The router also has the ability to link-aggregate two of the 1Gb ports (WAN port and LAN port #4) as your WAN interface for an effective 2Gb link if your ISP-facing device supports that type of connection.