Secondary DNS

What is secondary DNS?

Secondary DNS, also known as backup DNS or slave DNS, is a critical component of the domain name system (DNS) infrastructure that provides redundancy and improves the reliability and availability of a website or online service. In the event that the primary DNS server experiences downtime or becomes unreachable, the secondary DNS server steps in to ensure that domain names can still be resolved and users can access the website without interruption. By configuring a secondary DNS server, domain owners can create a backup system that mirrors the authoritative DNS records from the primary server, providing failover protection and ensuring continuous access to the website.