A Company's Web Application Is Deployed on Amazon EC2 Instances

question 33

Multiple Choice

A company's web application is deployed on Amazon EC2 instances behind a public Application Load Balancer. The application flags malicious requests and uses an AWS Lambda function to add the offending IP addresses to the network ACL to block any further requests for 24 hours. Recently, the application has been receiving more malicious requests, which causes the network ACL to reach its limit of allowed entries. Which action should be taken to block more IP addresses, without compromising the existing security requirements?

• A) Update the AWS Lambda function to remove blocked entries from the network ACL after 2 hours.
• B) Update the AWS Lambda function to block malicious IPs in security groups rather than the network ACL.
• C) Update the AWS Lambda function to block malicious IPs in AWS WAF attached to the Application Load Balancer.
• D) Update the AWS Lambda function to add an additional network ACL to the subnets once the limit for the previous ones has been reached.

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Definitions:

Service Level

A measure of the quality of a service provided, often defined as the percentage of customer demand that is met through immediate stock availability.

Lead Time

refers to the total time that elapses between the initiation and completion of a production process, from order to delivery.

Inventory Holding Cost

The expenses associated with storing unsold goods, including warehousing, insurance, taxes, spoilage, and opportunity costs.

Annual Demand

Annual demand quantifies the total quantity of a particular product or service that consumers are willing to buy over the course of a year.