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  5. How Zones Are Queried to Resolve a Domain Name?

How Zones Are Queried to Resolve a Domain Name?

When a domain name resolution request is initiated, the domain name is first queried in the zone of a subdomain if there is any.

  • If the zone has been created, the system returns the result from the zone configuration file.
  • Otherwise, the system queries the domain name from the zone configuration file of a higher-level domain name.

For example:

For example, you have created a zone for example.com and add an A record set for www.example.com, and also, you have created a zone for www.example.com and have not added an A record set for it.

In this case, if a visitor tries to access www.example.com, it is first queried in the configuration file of the www.example.com zone. However, because you have not added an A record set in the zone, no result will be returned.