What is a DNS Zone?
A DNS zone refers to a portion of the Domain Name System (DNS) namespace that is managed by a specific entity or organization. It is a distinct administrative space within the overall DNS hierarchy and is used to define how domain names are resolved to their corresponding IP addresses.
A DNS zone typically corresponds to a specific domain name or a subdomain. It contains the DNS records that provide the necessary information for translating domain names into IP addresses. These records include the authoritative name servers responsible for the zone, as well as other types of records like address (A) records, mail exchange (MX) records, canonical name (CNAME) records, and more.
Each DNS zone has a zone file, which is a text file that contains the DNS records associated with the zone. This file is usually stored on the authoritative name servers responsible for the zone. The zone file provides the necessary instructions for DNS resolution and serves as a reference for other DNS servers when they need to resolve domain names within that zone.
DNS zones allow organizations to manage and control their DNS infrastructure efficiently. They provide a way to delegate authority and distribute the responsibility for managing different parts of the DNS namespace. By dividing the namespace into zones, organizations can independently manage their own domain names and DNS records, making it easier to update, maintain, and secure their DNS infrastructure.