It is B: A: Incorrect> FSx file Gateway designed for low latency and efficient access to in-cloud FSx for Windows File Server file shares from your on-premises facility. B: Correct> This solution will allow the company to host all three tiers on Amazon EC2 instances while using Amazon FSx for Windows File Server to provide Windows-based file sharing between the tiers. This will allow the company to use specific features of SQL Server, such as native backups and Data Quality Services, while sharing files for processing between the tiers. C: Incorrect> Currently, Amazon EFS supports the NFSv4.1 protocol and does not natively support the SMB protocol, and can't be used in Windows instances yet. D: Incorrect> Amazon EBS is a block-level storage solution that is typically used to store data at the operating system level, rather than for file sharing between servers.

RDS for SQL Backups: aren't Native MSSQL backups Instead RDS creates a storage volume snapshot of the instance, backing up the entire instance not just individual databases.

Not A - File Gateway is just a gateway, needs S3 too B - Yes Not C - RDS does not support the required features, and EFS does not provide SMB Not D - RDS does not support the required features, and EBS volume shared between tiers doesn't make sense

B. Host all three tiers on Amazon EC2 instances. Use Amazon FSx for Windows File Server for file sharing between the tiers.

The question mentions Microsoft = windows EFS is Linux

This design satisfies the needs in the following ways: • Running all tiers on EC2 allows using SQL Server on EC2 with its native features like backups and Data Quality Services. SQL Server cannot be run directly on RDS. • Amazon FSx for Windows File Server provides fully managed Windows file storage with SMB access. This allows sharing files between the Windows EC2 instances for all three tiers. • FSx for Windows File Server has high performance, so it can handle file sharing needs between the tiers.

Why not C?

Yup B . RDS will not work , Native Backup only to S3 , and Data Quality is not supported , so all EC2 . https://aws.amazon.com/premiumsupport/knowledge-center/native-backup-rds-sql-server/ and https://www.sqlserver-dba.com/2021/07/aws-rds-sql-server-limitations.html

C. Host the application tier and the business tier on Amazon EC2 instances. Host the database tier on Amazon RDS. Use Amazon Elastic File System (Amazon EFS) for file sharing between the tiers. This solution allows the company to use specific features of SQL Server such as native backups and Data Quality Services, by hosting the database tier on Amazon RDS. It also enables file sharing between the tiers using Amazon EFS, which is a fully managed, highly available, and scalable file system. Amazon EFS provides shared access to files across multiple instances, which is important for processing files between the tiers. Additionally, hosting the application and business tiers on Amazon EC2 instances provides the company with the flexibility to configure and manage the environment according to their requirements.

Data Quality Services: If this feature is critical to your workload, consider choosing Amazon RDS Custom or Amazon EC2. https://docs.aws.amazon.com/prescriptive-guidance/latest/migration-sql-server/comparison.html

Correct Answer: B