Vce SAA-C03 Questions Latest

Understanding the Requirement: The company needs to migrate applications to AWS, maintaining isolated networks while allowing communication with a shared services VPC and among the applications.

Analysis of Options:

Software VPN Tunnels: This approach involves high administrative overhead and complexity in managing multiple VPN connections.

VPC Peering: While suitable for smaller numbers of VPCs, it becomes complex and hard to manage at scale with over 100 applications.

Direct Connect: Primarily used for high-bandwidth, low-latency connections to on-premises networks, not inter-VPC communication.

Transit Gateway: Simplifies network management by acting as a central hub, allowing easy routing and scalability as more applications are migrated.

Best Solution:

Transit Gateway: This provides a scalable, efficient solution with minimal administrative overhead for managing network connections between multiple VPCs and the shared services VPC.

Understanding the Requirement: EC2 instances need to upload data to S3 without using the public internet, and on-premises servers need to consume this data.

Analysis of Options:

Interface VPC Endpoint for EC2: Not relevant for accessing S3.

Gateway VPC Endpoint for S3 and Direct Connect: Provides private connectivity from EC2 instances to S3 and from on-premises to AWS, ensuring compliance with the requirement to avoid public internet.

Transit Gateway and Site-to-Site VPN: Adds unnecessary complexity and does not provide the same level of performance as Direct Connect.

Proxy EC2 Instances with NAT Gateways: Increases complexity and costs compared to a direct connection using VPC endpoints and Direct Connect.

Best Solution:

Gateway VPC Endpoint for S3 and Direct Connect: This solution ensures secure, private data transfer both within AWS and between on-premises and AWS, meeting the compliance requirements effectively.

Requirement Analysis: The company needs to scale throughput for uploading large files to S3 and downloading them to EC2 instances.

S3 Multipart Uploads: This method allows for the parallel upload of parts of a file, improving upload efficiency and reliability.

Parallel Fetching: Fetching multiple byte-ranges in parallel from S3 improves download performance.

Implementation:

For uploads, use the S3 multipart upload API to upload files in parallel.

For downloads, use the S3 API to request multiple byte-ranges concurrently.

Conclusion: These solutions effectively scale throughput and improve the performance of both uploads and downloads.

References

S3 Multipart Upload:Amazon S3 Multipart Upload

Parallel Fetching:S3 Byte-Range Fetches

Understanding the Requirement: The company has petabytes of data in S3 Standard across multiple buckets with varying access frequencies. They do not know the access patterns and need a cost-optimized storage solution with minimal operational effort.

Analysis of Options:

S3 Intelligent-Tiering: This storage class automatically moves data between two access tiers (frequent and infrequent) based on changing access patterns. It incurs a small monitoring and automation charge but eliminates the need to manually move data between storage classes.

S3 Storage Class Analysis Tool: While useful for determining access patterns, this tool requires manual intervention to move objects to the appropriate storage class, which increases operational overhead.

S3 Glacier Instant Retrieval: This storage class is designed for data that is rarely accessed but requires instant retrieval when needed. It may not be suitable for data with unknown and varying access patterns.

S3 One Zone-IA: This is a lower-cost option for infrequently accessed data stored in a single availability zone. It does not provide the same level of durability and availability as other options and requires knowledge of access patterns.

Best Option for Operational Efficiency:

S3 Intelligent-Tiering provides the best balance of cost savings and operational efficiency. It dynamically adjusts to access patterns without manual intervention, ensuring the company is only paying for what they need without the risk of incurring high costs for infrequent access data.