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CLF-C02 practice question: Networking (1 of 3)

Cloud Technology and Services A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.

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A start-up is launching a website on two web servers in different Availability Zones.

It wants to buy its domain name from AWS, and to stop sending visitors to a server that has failed.

Which TWO tasks can Amazon Route 53 perform for it? (Choose two.)

Choose two answers.

  1. A. Caching the website's images at edge locations near visitors
  2. B. Registering the start-up's own domain name with AWS
  3. C. Filtering web requests that contain SQL injection attempts
  4. D. Encrypting the data stored in the website's database
  5. E. Checking server health and routing visitors away from failed servers
Show the answer and explanation

Answers: B, E

  • A. Wrong: Caching content at edge locations is the job of Amazon CloudFront, not Route 53. Route 53 answers DNS queries and does not store copies of website content.
  • B. Right: Route 53 includes domain registration, so the start-up can buy and manage its domain name in the same place as its DNS records. Learn more: Amazon Route 53 overview (opens in a new tab)
  • C. Wrong: Filtering requests for SQL injection is done by AWS WAF. Route 53 directs DNS queries and does not inspect the contents of web requests.
  • D. Wrong: Encryption of stored data is set on the database service, using AWS KMS keys. Route 53 handles DNS and has no role in encrypting database storage.
  • E. Right: Route 53 health checks send requests to endpoints and stop returning records for servers that fail, so visitors reach healthy servers. Learn more: Health checks in simple Route 53 configurations (opens in a new tab)

Explanation

Route 53 is AWS's DNS service. It can register domain names and use health checks to route traffic only to healthy resources. CloudFront caches content, WAF filters web requests, and encryption at rest is a database setting, so those options describe other services.

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