I think this is probably quite dependent on what’s normal for ISPs in the region. In the UK for example, every ISP router I’ve had runs a DNS server and it’s that which is given out via DHCP. It then forwards onto the ISPs DNS platform.
American here, most of ISPs here do it as well. With modern router hardware, there is plenty of hardware available to run tiny DNS server that caches and forwards all requests to ISP upstream. Memory overhead is probably about 50MB and CPU overhead is trivial, probably .1% or less.
stevekemp|23 days ago
Nowadays I'm in Finland and definitely the router runs no DNS service, the DHCP service advertises the ISP resolvers.
Probably depends on the region/ISP I guess, but I had no expectation that it would be the more common option.
stackskipton|23 days ago