Product Collateral

Solution Brief - Dyn Secondary DNS

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@dyn dyn.com page 3 Solution Brief | Dyn Secondary DNS How it works: Secondary DNS (sometimes referred to as multi-DNS) operates in an "always on" manner to complement your existing infrastructure as an additional authoritative DNS service. When an end user's recursive server initiates a DNS request, both the "primary" DNS service and the "secondary" DNS will respond as soon as they receive the request. The response that reaches the recursive server first will be passed back to the end user, completing their request. This process effectively creates a race to respond to each incoming DNS request, ensuring performance can only improve. All domain information will continue to be managed within the primary DNS service in the same manner in which this information is configured today. This information will then be synchronized with the secondary service (using one of many supported protocols) to ensure both solutions are returning the same information to end users. Secondary DNS reduces the risk of outages to critical services while also protecting against delays while connecting to these services as any degradation on either DNS service will simply result in the alternative service winning the majority of the races to respond to incoming requests. This proves especially effective in the face of DNS-based DDoS attacks that often linger for days if not properly mitigated, bringing end user performance to a crawl before potentially rendering the services unavailable. Dyn's Secondary DNS complements your existing DNS infrastructure to ensure the highest level of availability and performance for your most critical online services.

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