Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 268 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01

Question #: 268
Topic #: 1

[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A media company is planning to host an event that the company will live stream to users. The company wants to use Amazon CloudFront.

A network engineer creates a primary origin and a secondary origin for CloudFront. The engineer needs to ensure that the primary origin can fail over to the secondary origin within 15 seconds if a disruption occurs.

Which solution will meet this requirement with the LEAST operational overhead?

A. Configure a Lambda@Edge function to check the health status of both origins every 10 seconds. Reroute incoming requests when the origin health status is unhealthy.
B. Create a Network Load Balancer (NLB) in front of both origins Configure the NLB as the origin in CloudFront.
C. Set the CloudFront origin connection timeout value to 5 seconds Set the origin connection attempts value to 2.
D. Configure a Lambda@Edge function to monitor incoming requests for an origin response. Reroute incoming requests if no response is received from the primary origin within 10 seconds.

Show Suggested Answer

Suggested Answer: C 🗳️

by Sudeepshiv at March 25, 2025, 2:26 p.m.

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Comments

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AWSLoverLoverLoverLoverLover

2 months, 3 weeks ago

Selected Answer: C

Amazon CloudFront supports origin failover natively for primary and secondary origins. It can automatically fail over to the secondary origin if the primary is unhealthy. To control how quickly failover happens, you use: Origin connection timeout: Time CloudFront waits to establish a connection. Origin connection attempts: Number of retry attempts before declaring failure. If you set timeout to 5 seconds and attempts to 2, the total failover time is 10 seconds. CloudFront will try the primary origin twice, each with a 5-second timeout. If both fail, it moves to the secondary origin — all within 15 seconds, satisfying your requirement.

upvoted 1 times

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ashk123456

3 months ago

Selected Answer: C

CloudFront determines origin health based on timeout and retry settings: ✅ Origin connection timeout: The time CloudFront waits before considering the origin unresponsive. Setting this to 5 seconds minimizes failover delay. ✅ Origin connection attempts: The number of retry attempts before marking the origin as unhealthy. Setting this to 2 attempts ensures failover within (5 sec * 2) = 10 seconds, well within the 15-second requirement. B.❌ Incorrect – An NLB does not provide failover between different origins in the way CloudFront does. CloudFront’s origin failover feature is simpler and requires less management.

upvoted 1 times

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Sudeepshiv

3 months ago

Selected Answer: C

CloudFront Failover Mechanism: • CloudFront allows you to configure multiple origins with automatic failover when the primary origin is unavailable. Connection timeout and retry attempts control how quickly CloudFront will attempt to use a secondary origin if the primary origin fails to respond.

upvoted 1 times

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