A Secondary DNS acts as a backup to the primary DNS server. It receives a copy of the DNS data from the primary server and steps in to resolve domain names when the primary server is unavailable. By providing an additional layer of redundancy, it significantly improves the reliability and availability of websites and web applications. Thus, a secondary DNS plays a vital role in maintaining continuous online presence, protecting businesses from the detrimental effects of downtime and ensuring a smooth user experience. Explore how advantageous Secondary DNS is.