Which solution meets these requirements?

A company runs a web application on three Amazon EC2 instances behind an Application Load Balancer (ALB). The company notices that random periods of increased traffic cause a degradation in the application’s performance. A SysOps administrator must scale the application to meet the increased traffic.

Which solution meets these requirements?
A . Create an Amazon CloudWatch alarm to monitor application latency and increase the size of each EC2 instance If the desired threshold is reached.
B . Create an Amazon EventBridge (Amazon CloudWatch Events) rule to monitor application latency and add an EC2 instance to the ALB if the desired threshold is reached.
C . Deploy the application to an Auto Scaling group of EC2 instances with a target tracking scaling policy. Attach the ALB to the Auto Scaling group.
D . Deploy the application to an Auto Scaling group of EC2 instances with a scheduled scaling policy.
Attach the ALB to the Auto Scaling group.

View Answer

Answer: C

Explanation:

Step-by-Step

Understand the Problem:

The web application experiences performance degradation during random periods of increased traffic.

Analyze the Requirements:

Implement a scalable solution to handle varying traffic loads. Maintain application performance during traffic spikes. Evaluate the Options:

Option A: Monitor application latency with CloudWatch alarm and increase instance size.

Manually resizing instances is not efficient for handling random traffic spikes.

Option B: Use EventBridge rule to add EC2 instance to ALB.

This approach is not as efficient as Auto Scaling for dynamic traffic management.

Option C: Deploy to an Auto Scaling group with target tracking scaling policy.

Automatically adjusts the number of instances based on traffic demand.

Ensures consistent application performance by scaling in response to traffic changes.

Option D: Deploy to an Auto Scaling group with scheduled scaling policy.

Suitable for predictable traffic patterns but not for random traffic spikes.

Select the Best Solution:

Option C: Using an Auto Scaling group with a target tracking scaling policy ensures the application scales dynamically based on traffic, maintaining performance.

Reference: Amazon EC2 Auto Scaling

Target Tracking Scaling Policies

Auto Scaling with a target tracking policy provides a robust solution for handling random traffic increases by dynamically adjusting the number of instances.