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.
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 nameserver 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 webpages, DNS resolution can comprise as much as 29% of initial page load time.
If your DNS solution is unreachable because of hardware failures, network problems or configuration errors, users may not be able to access your assets –regardless of where those assets reside. If DNS responses are sluggish because of internet congestion or latency the user experience will be impaired and your business may suffer.
To make matters worse, research suggests that threats to DNS availability are on the rise. For example, infrastructure layer (layers 3 & 4) Distributed Denial of Service (DDoS) attacks increased by 151% year-over-year. While a recent Aberdeen Group report found that 78% of enterprise organizations surveyed experience four or more website disruptions per month at an average cost of $1,000 per minute of downtime.
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.