ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
A financial services firm runs a public REST API on a single m5.large EC2 instance in us-east-1a behind an Application Load Balancer. The team must ensure the API remains available if that Availability Zone fails, and ongoing costs must stay almost unchanged while continuing to use m5.large on EC2. Which action best meets the goal?
Place the existing instance in an Auto Scaling group that spans two Availability Zones, set the desired and minimum capacity to 1, and attach the group to the current load balancer.
Enable EC2 Auto Recovery on the instance so AWS can automatically recover it on new hardware if it becomes impaired.
Launch a second m5.large instance in the same Availability Zone and register both instances with the existing load balancer.
Convert the instance to a Spot Instance and use a Spot Fleet to replace it automatically if it is interrupted.
Placing the existing instance in an Auto Scaling group (ASG) that spans multiple Availability Zones and setting both the desired and minimum capacity to 1 maintains exactly one m5.large instance under normal conditions at no extra steady-state cost. If the current instance or its entire AZ becomes unavailable, the ASG launches a replacement in another healthy AZ, and the Application Load Balancer automatically routes traffic to the new target. Adding a second instance in the same AZ does not protect against an AZ outage. Converting to Spot reduces cost but risks interruption. EC2 Auto Recovery only handles hardware issues within the same AZ and cannot recover from an AZ-wide failure.
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What is an Auto Scaling Group (ASG)?
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How does an Application Load Balancer (ALB) function?
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What is an Availability Zone (AZ) in AWS?
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ISC2 Systems Security Certified Practitioner (SSCP)
Security Concepts and Practices
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