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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Cost-Optimized Architectures | 20% | - Cost management tools
|
| Topic 2: Design High-Performing Architectures | 24% | - Compute and storage optimization
|
| Topic 3: Design Secure Architectures | 30% | - Secure workloads and applications
|
| Topic 4: Design Resilient Architectures | 26% | - Fault tolerance and recovery
|
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46. Frage
A healthcare company stores personally identifiable information (PII) data in an Amazon RDS for Oracle database. The company must encrypt the PII data at rest. The company must use dedicated hardware modules to store and manage the encryption keys. Which solution will meet this requirement?
Antwort: C
Begründung:
Amazon RDS supports encryption at rest by using AWS KMS keys backed by AWS CloudHSM.
This allows use of dedicated FIPS 140-2 Level 3 validated hardware modules to manage encryption keys, meeting compliance for sensitive data such as PII.
"You can use AWS KMS with keys that are backed by AWS CloudHSM to control the encryption of RDS databases. This provides dedicated HSM-backed key storage and management." Why B is correct:
Meets the requirement for dedicated HSM hardware.
Fully integrates with RDS for transparent encryption at rest.
Satisfies compliance standards for healthcare and regulated data.
Why others are incorrect:
A: Keys in CloudHSM directly are not used by RDS; they must be managed through KMS integration.
C: EC2 instance stores are ephemeral, not suitable for RDS databases.
D: SSE-S3 applies to S3 objects, not databases.
47. Frage
A company has a two-tier environment in its on-premises data center which is composed of an application tier and database tier.
You are instructed to migrate their environment to the AWS cloud, and to design the subnets in their VPC with the following requirements:
1. There is an application load balancer that would distribute the incoming traffic among the servers in the application tier.
2. The application tier and the database tier must not be accessible from the public Internet. The application tier should only accept traffic coming from the load balancer.
3. The database tier contains very sensitive data. It must not share the same subnet with other AWS resources and its custom route table with other instances in the environment.
4. The environment must be highly available and scalable to handle a surge of incoming traffic over the Internet.
How many subnets should you create to meet the above requirements?
Antwort: B
Begründung:
The given scenario indicated 4 requirements that should be met in order to successfully migrate their two-tier environment from their on-premises data center to AWS Cloud. The first requirement means that you have to use an application load balancer (ALB) to distribute the incoming traffic to your application servers.
The second requirement specifies that both your application and database tier should not be accessible from the public Internet. This means that you could create a single private subnet for both of your application and database tier. However, the third requirement mentioned that the database tier should not share the same subnet with other AWS resources to protect its sensitive data. This means that you should provision one private subnet for your application tier and another private subnet for your database tier.
The last requirement alludes to the need for using at least two Availability Zones to achieve high availability. This means that you have to distribute your application servers to two AZs as well as your database which can be set up with a master-slave configuration to properly replicate the data between two zones.
If you have more than one private subnet in the same Availability Zone that contains instances that need to be registered with the load balancer, you only need to create one public subnet. You need only one public subnet per Availability Zone; you can add the private instances in all the private subnets that reside in that particular Availability Zone.
<img src='https://i.udemycdn.com/redactor/raw/2019-11-15_05-21-05-c823048b82f65f434901a13b2ecdbfce.png'> Since you have a public internet-facing load balancer that has a group of backend Amazon EC2 instances that are deployed in a private subnet, you must create the corresponding public subnets in the same Availability Zones. This new public subnet is on top of the private subnet that is used by your private EC2 instances. Lastly, you should associate these public subnets to the Internet-facing load balancer to complete the setup.
To summarize, we need to have one private subnet for the application tier and another one for the database tier. We then need to create another public subnet in the same Availability Zone where the private EC2 instances are hosted, in order to properly connect the public Internet-facing load balancer to your instances. This means that we have to use a total of 3 subnets consisting of 2 private subnets and 1 public subnet.
To meet the requirement of high availability, we have to deploy the stack to two Availability Zones. This means that you have to double the number of subnets you are using. Take note as well that you must create the corresponding public subnet in the same Availability Zone of your private EC2 servers in order for it to properly communicate with the load balancer.
Hence, the correct answer is 6 subnets.
References:
https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Scenario2.html
https://aws.amazon.com/premiumsupport/knowledge-center/public-load-balancer-private-ec2/
Check out this Amazon VPC Cheat Sheet:
https://tutorialsdojo.com/amazon-vpc/
48. Frage
A company needs to give a globally distributed development team secure access to the company's AWS resources in a way that complies with security policies.
The company currently uses an on-premises Active Directory for internal authentication. The company uses AWS Organizations to manage multiple AWS accounts that support multiple projects.
The company needs a solution to integrate with the existing infrastructure to provide centralized identity management and access control.
Which solution will meet these requirements with the LEAST operational overhead?
Antwort: D
Begründung:
UsingAD ConnectorwithAWS IAM Identity Center(formerly AWS Single Sign-On) allows the company to leverage its existingon-premises Active Directoryfor centralized identity management and access control. AD Connector acts as a proxy to the on-premises AD withoutrequiring additional infrastructure or complex setup.
This solution integrates seamlessly with AWS, allowing the development team to use their existing AD credentials to access AWS resources across multiple accounts managed by AWS Organizations. The permissions for AWS resources can be managed centrally through IAM Identity Center by configuring permission sets.
This solution provides:
Least operational overhead: AD Connector is fully managed, and IAM Identity Center allows centralized management of permissions across accounts.
Secure access: The solution complies with security policies by using existing AD authentication mechanisms.
Option A (AWS Managed AD): Setting up a fully managed AWS AD and establishing a trust is more complex and involves additional operational overhead.
Option B (IAM Users): Manually managing IAM users and permissions is less scalable and increases operational complexity.
Option D (Cognito): Amazon Cognito is more suited for user-facing applications rather than internal identity management for AWS resources.
AWS References:
AD Connector with IAM Identity Center
AWS IAM Identity Center
49. Frage
[Design Resilient Architectures]
A company has a three-tier application on AWS that ingests sensor data from its users' devices The traffic flows through a Network Load Balancer (NLB) then to Amazon EC2 instances for the web tier and finally to EC2 instances for the application tier The application tier makes calls to a database What should a solutions architect do to improve the security of the data in transit?
Antwort: B
Begründung:
The best option to improve the security of the data in transit is to configure a TLS listener and deploy the server certificate on the NLB. This will ensure that the data is encrypted and secure as it travels through the network. Additionally, you could also configure AWS Shield Advanced and enable AWS WAF on the NLB to further protect the network from malicious attacks. Alternatively, you could also change the load balancer to an Application Load Balancer (ALB) and enable AWS WAF on the ALB. Finally, you could also encrypt the Amazon Elastic Block Store (Amazon EBS) volume on the EC2 instances by using AWS Key Management Service (AWS KMS).
You must specify an SSL certificate for a TLS listener. The load balancer uses the certificate to terminate the connection and decrypt requests from clients before routing them to targets.https://docs.aws.amazon.com/elasticloadbalancing/latest/network/create-listener.html
50. Frage
A solutions architect needs to implement a solution that can handle up to 5,000 messages per second. The solution must publish messages as events to multiple consumers. The messages are upto 500 KB in size. The message consumers need to have the ability to use multiple programming languages to consume the messages with minimal latency. The solution must retain published messages for more than 3 months. The solution must enforce strict ordering of the messages.
Which solution will meet these requirements?
Antwort: D
Begründung:
A:Kinesis Data Streams:Supports high throughput, strict ordering, multiple consumers, and data retention for
365 days.
B:SNS + SQS FIFO:Can enforce ordering but lacks native support for 500 KB messages and retention requirements.
C:EventBridge:Lacks strict ordering and message size compatibility.
D:SNS + Firehose:Not designed for strict ordering or large message sizes.
References:Amazon Kinesis Data Streams
51. Frage
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