If you put two modems for the Internet into a laptop, which one will access the Internet from?

Question

linux

Can I choose which modem to log in from? Then turn off one, exit through the other? Preferably via console.

Answer 1

route add default GW ip имя_интерфейса

Answer 2

In Windows, as Dmitry correctly wrote, the default gateway will belong to the first network connection that appears. If the network connection is lost, then the second one may be activated. You may need to do something like ipconfig /renew. Unix has solutions for backing up connection channels and load balancing. In this direction, you need to dig for Windows. I think there are solutions for her too.