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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Secure Architectures | 30% | - Design secure access to AWS resources
|
| Topic 2: Design High-Performing Architectures | 24% | - Design high-performing and elastic compute solutions
|
| Topic 3: Design Resilient Architectures | 26% | - Design highly available and/or fault-tolerant architectures
|
| Topic 4: Design Cost-Optimized Architectures | 20% | - Design cost-optimized database solutions
|
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NEW QUESTION # 31
A company has an automobile sales website that stores its listings in a database on Amazon RDS When an automobile is sold the listing needs to be removed from the website and the data must be sent to multiple target systems.
Which design should a solutions architect recommend?
Answer: D
Explanation:
https://docs.aws.amazon.com/lambda/latest/dg/services-rds.html
https://docs.aws.amazon.com/lambda/latest/dg/with-sns.html
NEW QUESTION # 32
A business plans to deploy an application on EC2 instances within an Amazon VPC and is considering adopting a Network Load Balancer to distribute incoming traffic among the instances. A solutions architect needs to suggest a solution that will enable the security team to inspect traffic entering and exiting their VPC.
Which approach satisfies the requirements?
Answer: D
Explanation:
AWS Network Firewall is a stateful, managed, network firewall, and intrusion detection and prevention service for your virtual private cloud (VPC). With Network Firewall, you can filter traffic at the perimeter of your VPC. This includes traffic going to and coming from an internet gateway, NAT gateway, or over VPN or AWS Direct Connect. Network Firewall uses Suricata - an open-source intrusion prevention system (IPS) for stateful inspection.
The diagram below shows an AWS Network firewall deployed in a single availability zone and traffic flow for a workload in a public subnet:
You can use Network Firewall to monitor and protect your Amazon VPC traffic in a number of ways, including the following:
- Pass traffic through only from known AWS service domains or IP address endpoints, such as Amazon S3.
- Use custom lists of known bad domains to limit the types of domain names that your applications can access.
- Perform deep packet inspection on traffic entering or leaving your VPC.
- Use stateful protocol detection to filter protocols like HTTPS, independent of the port used. Therefore, the correct answer is: Create a firewall using the AWS Network Firewall service at the VPC level then add custom rule groups for inspecting ingress and egress traffic. Update the necessary VPC route tables.
The option that says: Use the Network Access Analyzer service on the application's VPC for inspecting ingress and egress traffic. Create a new Network Access Scope to filter and analyze all incoming and outgoing requests is incorrect. Network Access Analyzer is a feature of VPC that reports on unintended access to your AWS resources based on the security and compliance that you set. This service is not capable of performing deep packet inspection on traffic entering or leaving your VPC, unlike AWS Network Firewall.
The option that says: Create a firewall at the subnet level using the Amazon Detective service. Inspect the ingress and egress traffic using the VPC Reachability Analyzer is incorrect because a firewall must be created at the VPC level and not at the subnet level. Moreover, Amazon Detective can't be used to create a firewall. This service just automatically collects log data from your AWS resources to analyze, investigate, and quickly identify the root cause of potential security issues or suspicious activities in your AWS account. For this scenario, you have to use the AWS Network Firewall instead.
The option that says: Enable Traffic Mirroring on the Network Load Balancer and forward traffic to the instances. Create a traffic mirror filter to inspect the ingress and egress of data that traverses your Amazon VPC is incorrect as this alone accomplishes nothing. It would make more sense if you redirect the traffic to an EC2 instance where an Intrusion Detection System (IDS) is running. Remember that Traffic Mirroring is simply an Amazon VPC feature that you can use to copy network traffic from an elastic network interface. Traffic mirror filters can't inspect the actual packet of the incoming and outgoing traffic.
References:
https://aws.amazon.com/blogs/networking-and-content-delivery/deployment-models-for-aws-network-fire wall/
https://docs.aws.amazon.com/network-firewall/latest/developerguide/what-is-aws-network-firewall.html
NEW QUESTION # 33
A company wants to deploy a new public web application on AWS. The application includes a web server tier that uses Amazon EC2 instances. The application also includes a database tier that uses an Amazon RDS for MySQL DB instance.
The application must be secure and accessible for global customers that have dynamic IP addresses.
How should a solutions architect configure the security groups to meet these requirements?
Answer: C
Explanation:
Because the application is public and serves global customers with dynamic IP addresses, the web tier must allow HTTPS traffic from0.0.0.0/0on port 443. For the database tier, the secure design is to allow MySQL access only from theweb tier's security group, not from the internet.
AWS RDS documentation explains that you can specify another VPC security group as the source for the DB security group, which allows application servers to connect without exposing the database publicly.
NEW QUESTION # 34
A company's packaged application dynamically creates and returns single-use text files in response to user requests. The company is using Amazon CloudFront for distribution, but wants to further reduce data transfer costs. The company cannot modify the application's source code.
What should a solutions architect do to reduce costs?
Answer: A
Explanation:
Lambda@Edge allows you to run functions at CloudFront edge locations, enabling modifications to content before it's delivered to users, including compression - which directly reduces data transfer cost.
"Lambda@Edge can be used to compress or modify your content before delivering it to end users, which reduces the amount of data transferred."
- Lambda@Edge Use Cases
Since code modifications aren't allowed, using Lambda@Edge is a non-invasive way to:
* Compress responses.
* Reduce transfer size = lower CloudFront cost.
Incorrect Options:
* B: S3 Transfer Acceleration improves speed, not cost.
* C: Caching doesn't help if content is always unique (single-use).
* D: Multipart uploads help with large file uploads, not transfers.
Reference:
Lambda@Edge for Content Compression
CloudFront Pricing and Cost Optimization
NEW QUESTION # 35
A company uses an Amazon Aurora PostgreSQL DB cluster to store its critical data in the us-east-1 Region.
The company wants to develop a disaster recovery plan to recover the database in the us-west-1 Region. The company has a recovery time objective (RTO) of 5 minutes and has a recovery point objective (RPO) of 1 minute.
What should a solutions architect do to meet these requirements?
Answer: A
Explanation:
* Aurora global database is specifically designed for cross-Region disaster recovery and low-latency global reads.
* It provides:
* Physical storage-level replication between Regions, typically with lag of under 1 second, easily satisfying RPO 1 minute.
* Fast cross-Region failover capabilities, often within minutes or less, which meets the RTO 5 minutes requirement.
* You configure the primary Region as the writer cluster and additional Regions (such as us-west-1) as secondary clusters with reader endpoints. In a disaster, you promote the secondary to be the new writer.
Why others are not correct:
* A: Standard cross-Region read replicas for Aurora PostgreSQL do not provide automatic multi-Region failover with the same guarantees as Aurora global database and may not meet strict RTO/RPO requirements.
* C: Logical replication and custom EventBridge failover is complex, error-prone, and higher overhead compared to the managed global database feature.
* D: Restoring from snapshots plus cross-Region replication is too slow to meet RTO 5 minutes and certainly cannot maintain RPO 1 minute.
NEW QUESTION # 36
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