We're talking about a typical 1 Gbps (non-PoE) LAN port on the router, so you could plug in another computer hardwired (or a switch). The jack is pennies, and

We're talking about a typical 1 Gbps (non-PoE) LAN port on the router, so you could plug in another computer hardwired (or a switch). The jack is pennies, and the rest of the chips to support the extra Ethernet interface are still readily available. Version 1 of the router had a LAN port (labeled AUX).