From the course: Managing DNS Essential Training

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What is in a zone?

What is in a zone?

From the course: Managing DNS Essential Training

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What is in a zone?

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- [Voiceover] So we've talked a lot about the entire hierarchy of the DNS system and how it works theoretically. We've talked about root servers, we've talked about the top-level domains, we talked about domains even. Let's talk the zone files that exist within a single domain, right, so let's sort of get this down to the one domain, and let's look inside and see what would be in that zone file that expresses information about that domain. So the first thing I want to talk about is the TTL. There's a lot of TTL information in a zone, actually, not just the default, that is the default TTL for the records, or the resource records inside the zone, but also for the zone itself, right? If we have a primary zone, and then a secondary zone, that secondary zone needs to have a set of rules to follow about when it will expire its information, right? That information for the secondary zone is going to be different than the rule that would be followed by any old resolver about when to expire…

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