How Redundant DNS Services Provide Resilience and Improve Application Performance
Global DNS performance and availability are critical to business continuity, security and end-user experience. With online applications, content, data and services often scattered across the internet and housed in your own DCs, your CDN or in your cloud instances; it’s more important than ever to have a robust, redundant DNS solution making sure your assets get delivered as quickly and reliably as possible.
This whitepaper reviews the business advantages of implementing a high availability DNS architecture using redundant DNS services. You will learn:
- The critical role DNS plays in the user experience.
- The failure and outage risks of relying on a single DNS solution.
- The major resiliency and performance differences between unicast vs anycast addressing.
- Criteria for evaluating a managed DNS service provider.
DNS is Central to the User Experience
Every user’s first interaction with your online applications and services begins with a series of DNS queries. The Domain Name System (DNS) is a distributed internet database that maps human-readable names to IP addresses, enabling users to reach the correct destination when entering a URL. DNS mappings are maintained in special-purpose servers called DNS nameservers. When a user enters your company’s URL, a DNS query is routed to a DNS name server that contains the address mappings for your company’s internet domain. Your online applications, content, data and services may be scattered across the internet. Some of your assets might reside in your corporate data center, some might be distributed across a CDN and some might reside in the cloud. DNS is responsible for steering users to the proper source. DNS availability and performance are central to the user experience. A contemporary webpage can involve dozens of DNS lookups. For complex web pages, DNS resolution can comprise as much as 29% of initial page load time.
Global DNS performance and availability are critical to user experience.
According to Gartner, “DNS is mission-critical to all organizations that connect to the internet. DNS failure or poor performance leads to applications, data and content becoming unavailable, causing user frustration, lost sales and business reputation damage”. But many businesses still rely on a single, often in-house DNS solution that lacks global scale and resiliency.
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