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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q763-Q768):
NEW QUESTION # 763
A media company has two VPCs: VPC-1 and VPC-2 with peering connection between each other.
VPC-1 only contains private subnets while VPC-2 only contains public subnets. The company uses a single AWS Direct Connect connection and a virtual interface to connect their on-premises network with VPC-1.
Which of the following options increase the fault tolerance of the connection to VPC-1? (Select TWO.)
Answer: C,E
Explanation:
In this scenario, you have two VPCs which have peering connections with each other. Note that a VPC peering connection does not support edge to edge routing. This means that if either VPC in a peering relationship has one of the following connections, you cannot extend the peering relationship to that connection:
- A VPN connection or an AWS Direct Connect connection to a corporate network
- An Internet connection through an Internet gateway
- An Internet connection in a private subnet through a NAT device
- A gateway VPC endpoint to an AWS service; for example, an endpoint to Amazon S3.
- (IPv6) A ClassicLink connection. You can enable IPv4 communication between a linked EC2-Classic instance and instances in a VPC on the other side of a VPC peering connection. However, IPv6 is not supported in EC2-Classic, so you cannot extend this connection for IPv6 communication.
For example, if VPC A and VPC B are peered, and VPC A has any of these connections, then instances in VPC B cannot use the connection to access resources on the other side of the connection. Similarly, resources on the other side of a connection cannot use the connection to access VPC B.
Hence, this means that you cannot use VPC-2 to extend the peering relationship that exists between VPC-1 and the on-premises network. For example, traffic from the corporate network can't directly access VPC-1 by using the VPN connection or the AWS Direct Connect connection to VPC-2, which is why the following options are incorrect:
- Use the AWS VPN CloudHub to create a new AWS Direct Connect connection and private virtual interface in the same region as VPC-2.
- Establish a hardware VPN over the Internet between VPC-2 and the on-premises network.
- Establish a new AWS Direct Connect connection and private virtual interface in the same region as VPC-2.
You can do the following to provide a highly available, fault-tolerant network connection:
- Establish a hardware VPN over the Internet between the VPC and the on-premises network.
- Establish another AWS Direct Connect connection and private virtual interface in the same AWS region.
References: https://docs.aws.amazon.com/vpc/latest/peering/invalid-peering-configurations.html#edge- to-edge-vgw https://aws.amazon.com/premiumsupport/knowledge-center/configure-vpn-backup-dx/
https://aws.amazon.com/answers/networking/aws-multiple-data-center-ha-network-connectivity/ Check out this Amazon VPC Cheat Sheet:
https://tutorialsdojo.com/amazon-vpc/
NEW QUESTION # 764
A company hosts its core network services, including directory services and DNS, in its on-premises data center. The data center is connected to the AWS Cloud using AWS Direct Connect (DX). Additional AWS accounts are planned that will require quick, cost-effective, and consistent access to these network services.
What should a solutions architect implement to meet these requirements with the LEAST amount of operational overhead?
Answer: D
Explanation:
* Requirement Analysis: Need quick, cost-effective, and consistent access to on-premises network services from multiple AWS accounts.
* AWS Transit Gateway: Centralizes and simplifies network management by connecting VPCs and on- premises networks.
* Direct Connect Integration: Assigning DX to the transit gateway ensures consistent and high- performance connectivity.
* Operational Overhead: Minimal because Transit Gateway simplifies routing and management.
* Implementation:
* Set up AWS Transit Gateway.
* Connect new AWS accounts to the Transit Gateway.
* Route traffic through Transit Gateway to on-premises servers via Direct Connect.
* Conclusion: This solution provides a scalable, cost-effective, and low-overhead method to meet connectivity requirements.
References
* AWS Transit Gateway: AWS Transit Gateway Documentation
NEW QUESTION # 765
A medical research lab produces data that is related to a new study. The lab wants to make the data available with minimum latency to clinics across the country for their on-premises, file-based applications. The data files are stored in an Amazon S3 bucket that has read-only permissions for each clinic.
What should a solutions architect recommend to meet these requirements?
Answer: D
Explanation:
Explanation
AWS Storage Gateway is a service that connects an on-premises software appliance with cloud-based storage to provide seamless and secure integration between an organization's on-premises IT environment and AWS's storage infrastructure. By deploying a file gateway as a virtual machine on each clinic's premises, the medical research lab can provide low-latency access to the data stored in the S3 bucket while maintaining read-only permissions for each clinic. This solution allows the clinics to access the data files directly from their on-premises file-based applications without the need for data transfer or migration.
NEW QUESTION # 766
A company is designing a microservice-based architecture tor a new application on AWS. Each microservice will run on its own set of Amazon EC2 instances. Each microservice will need to interact with multiple AWS services such as Amazon S3 and Amazon Simple Queue Service (Amazon SQS).
The company wants to manage permissions for each EC2 instance based on the principle of least privilege.
Which solution will meet this requirement?
Answer: D
Explanation:
When designing a microservice architecture where each microservice interacts with different AWS services, it's essential to follow the principle of least privilege. This means granting each microservice only the permissions it needs to perform its tasks, reducing the risk of unauthorized access or accidental actions.
The recommended approach is to create individual IAM roles with policies that grant each microservice the specific permissions it requires. Then, these roles should be associated with the EC2 instances that run the corresponding microservice. By doing so, each EC2 instance will assume its specific IAM role, and permissions will be automatically managed by AWS.
IAM roles provide temporary credentials via the instance metadata service, eliminating the need to hard-code credentials in your application code, which enhances security.
AWS References:
* IAM Roles for Amazon EC2 explains how EC2 instances can use IAM roles to securely access AWS services without managing long-term credentials.
* Best Practices for IAM includes recommendations for implementing the least privilege principle and using IAM roles effectively.
Why the other options are incorrect:
* A. Assign an IAM user to each microservice: This requires managing long-term credentials (access keys), which should be avoided. Storing keys in application code is insecure and creates a maintenance burden.
* B. Create a single IAM role: This violates the principle of least privilege, as a single role with broad permissions across all services is less secure.
* C. Use AWS Organizations: This approach adds unnecessary complexity. Managing permissions at the account level for each microservice is excessive for this use case and doesn't adhere to the principle of least privilege.
NEW QUESTION # 767
[Design High-Performing Architectures]
A company collects data from a large number of participants who use wearabledevices.The company stores the data in an Amazon DynamoDB table and uses applications to analyze the dat a. The data workload is constant and predictable. The company wants to stay at or below its forecasted budget for DynamoDB.
Whihc solution will meet these requirements MOST cost-effectively?
Answer: D
Explanation:
This option is the most efficient because it uses provisioned mode, which is a read/write capacity mode for processing reads and writes on your tables that lets you specify how much read and writethroughput you expect your application to perform1. It also specifies the read capacity units (RCUs) and write capacity units (WCUs), which are the amount of data your application needs to read or write per second. It also meets the requirement of staying at or below its forecasted budget for DynamoDB, as provisioned mode has lower costs than on-demand mode for predictable workloads. This solution meets the requirement of collecting data from a large number of participants who use wearable devices with a constant and predictable data workload. Option A is less efficient because it uses provisioned mode and DynamoDB Standard-Infrequent Access (DynamoDB Standard-IA), which is a storage class for infrequently accessed items that require milliseconds latency2. However, this does not meet the requirement of collecting data from a large number of participants who use wearable devices with a constant and predictable data workload, as DynamoDB Standard-IA is more suitable for items that are accessed less frequently than once every 30 days. Option C is less efficient because it uses on-demand mode, which is a read/write capacity mode that lets you pay only for what you use by automatically adjusting your table's capacity in response to changing demand3. However, this does not meet the requirement of staying at or below its forecasted budget for DynamoDB, ason-demand mode has higher costs than provisioned mode for predictable workloads. Option D is less efficient because it uses on-demand mode and specifies the RCUs and WCUs with reserved capacity, which is a way to reserve read and write capacity for your tables in exchange for discounted hourly rates. However, this does not meet the requirement of staying at or below its forecasted budget for DynamoDB, as on-demand mode has higher costs than provisioned mode for predictable workloads. Also, specifying RCUs and WCUs with reserved capacity is not possible with on-demand mode, as it only applies to provisioned mode.
NEW QUESTION # 768
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