Given , Andy Burns
wrote:

of if you want to be able to switch seamlessly from wifi to wired
ethernet, create a bridge of the two NICs, and let the IP address get
assigned to the bridge, rather than having IP addresses assigned to each
individual NIC.

Just to be clear, there is no "wired Ethernet" in this desktop computer.

There is no WiFi card.
There is an Ethernet port and USB ports.

So the USB 802.11n dongle is in the USB port.
And a radio and antenna is connected to the Ethernet port.

The computer doesn't know that the Ethernet port isn't a wired connection
though, so, maybe that distinction that it's not "really" Ethernet, doesn't
matter.