I have friends with little technical knowledge. I set up DNS4ME so they could watch some geoblocked films on an Android box. The layout of their place makes it fairly impossible to run an Ethernet cable to the box so it is on wi-fi. It all works fine but because it is on wi-fi, I had to change the DNS server on the router. This particular VF router only has place for one DNS address but it works fine, no problem.
My networking knowledge is limited and my question is what happens if the one DNS server goes down? Since there is no alternate does everything come to a stop, or will the router fall back to the default Vodafone DNS?