How many zone in dns

Domains are broken into zones for which individual DNS servers are responsible. A "domain" represents the entire set of names / machines that are contained. Zones contain name and IP address information about one or more parts of a DNS domain. A server that contains all of the information for a zone is the. If a DNS Server is authoritative over a zone file, it has full control over it. A Primary DNS Server can update, make additions to, modify and delete records in.