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AWS Certified Solutions Architect study material · question 368 of 500

Which two advantages does Global Accelerator hold over DNS-based failover? Choose two.

  1. Traffic joins the AWS backbone at the nearest edge location, lowering latency
  2. It avoids the caching problems that DNS systems suffer
  3. It removes the need for health checks entirely
  4. It replicates application data between Regions
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Answer: A. Traffic joins the AWS backbone at the nearest edge location, lowering latency
B. It avoids the caching problems that DNS systems suffer

Global Accelerator uses the AWS edge network and static Anycast addresses, so no resolver cache can hold clients on a stale answer.

Source: Disaster recovery options in the cloud (Amazon Web Services) — Pilot light — traffic management

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