SAP-C02 Question #397: Real Exam Question with Answer & Explanation

Question

A company runs an loT application in the AWS Cloud. The company has millions of sensors that collect data from houses in the United States. The sensors use the MOTT protocol to connect and send data to a custom MQTT broker. The MQTT broker stores the data on a single Amazon EC2 instance. The sensors connect to the broker through the domain named iot.example.com. The company uses Amazon Route 53 as its DNS service. The company stores the data in Amazon DynamoDB. On several occasions, the amount of data has overloaded the MOTT broker and has resulted in lost sensor data. The company must improve the reliability of the solution. Which solution will meet these requirements?

Options

• ACreate an Application Load Balancer (ALB) and an Auto Scaling group for the MOTT broker. Use
• BSet up AWS loT Core to receive the sensor data. Create and configure a custom domain to
• CCreate a Network Load Balancer (NLB). Set the MQTT broker as the target. Create an AWS
• DSet up AWS loT Greengrass to receive the sensor data. Update the DNS record in Route 53 to

Explanation

it describes a solution that uses an Application Load Balancer (ALB) and an Auto Scaling group for the MQTT broker. The ALB distributes incoming traffic across the instances in the Auto Scaling group and allows for automatic scaling based on incoming traffic. The use of an alias record in Route 53 allows for easy updates to the DNS record without changing the IP address. This solution improves the reliability of the MQTT broker by allowing it to automatically scale based on incoming traffic, reducing the likelihood of lost data due to broker overload. https://aws.amazon.com/elasticloadbalancing/applicationloadbalancer/ https://aws.amazon.com/autoscaling/ https://aws.amazon.com/route53/

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