From the course: Managing DNS Essential Training

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How split-horizon DNS works

How split-horizon DNS works

From the course: Managing DNS Essential Training

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How split-horizon DNS works

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- [Voiceover] DNS servers can live on the internet of course but they can also exist within private networks hosting information about the resources that are available within that private network. DNS servers can be placed safely almost anywhere. You can start up a DNS server on a network without fear of disrupting that network because no client will request information from your DNS server unless it has been configured to use your DNS server to look up information. That's called a recursive query. They're only used by client systems that are configured to use them. This is dramatically different from a DHCP server which can be dangerous on a new network if it conflicts with another DHCP server. This is because DHCP responds to broadcasted queries that are sent to an entire subnet by a device when that device joins the network. On the other hand, DNS servers will sit quietly until a client registers a request specifically with that server directly. You can, of course, and in most…

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