CLF-C02 Question 177
Single answerA company hosts a web application on Amazon EC2 instances behind an Application Load Balancer. The traffic to the application varies significantly throughout the day. How can the company ensure that the application automatically handles increases and decreases in traffic demand without manual intervention?
- A
Use Amazon EC2 Auto Scaling to automatically adjust the number of instances based on demand.
- B
Manually launch and terminate EC2 instances as traffic fluctuates.
- C
Use Amazon CloudFront to cache content and automatically scale EC2 instances.
- D
Enable Amazon S3 Auto Scaling to manage traffic spikes.
Show answer and explanation
Correct answer: A
Explanation
Amazon EC2 Auto Scaling provides elasticity by automatically increasing or decreasing the number of EC2 instances based on traffic demand. This ensures that the application can handle varying workloads efficiently and cost-effectively without requiring manual intervention.
- A. Correct.
Amazon EC2 Auto Scaling automatically adjusts the number of EC2 instances based on traffic demand, providing elasticity by scaling out during high traffic and scaling in during low traffic.
- B. Incorrect.
Manually managing instances is not an efficient or scalable solution for handling traffic fluctuations, as it requires constant monitoring and manual intervention.
- C. Incorrect.
Amazon CloudFront helps cache content closer to users, reducing latency and load on the backend, but it does not manage EC2 instance scaling.
- D. Incorrect.
Amazon S3 Auto Scaling is not a feature. S3 is an object storage service and does not scale EC2 instances or manage traffic spikes.