How are the primary and secondary dns of the router switched?

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djalin2020-04-01 12:55:11

Domain Name System

djalin, 2020-04-01 12:55:11

Hello, in all routers you can specify two dns servers.

The question is, how are they used? First one, and if it is not available, then the second one or alternately - balancing?

What happens if I specify from different services, for example, primary Google, secondary Yandex - or is it not desirable?

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Ronald McDonald, 2020-04-01
@djalin

The question is, how are they used? First one, and if it is not available then the second

This.

What happens if I specify from different services, for example, primary Google, secondary Yandex

First it will be used from Google, then from Yandex.
Also, the second DNS is used if the first one does not have the required entry.