Can Ethernet and wi-fi be used concurrently?

[Thomas Mueller]

from Nick Wolff:

> Yes this is no issue just need to make sure you don't have an default route
> on your Ethernet interface(May need to set a static) and that the hotspot
> network and intranet network doesn't overlap.

To use the ethernet, I believe I need

route add default 192.168.0.1

if I don't use dhclient.

How do I avoid this, and then how would I add route for the hotspot network?

Tom