Amazon EFS

Answer: B.

Option A is INCORRECT.

Amazon FSx for Windows File Server is built for windows server and is accessible over SMB protocol.

Option B is CORRECT.

EFS is a POSIX compliant, fully managed and cost-effective NFS file storage solution that could be used with both on-prem and AWS resources.

Option C is INCORRECT.

Amazon FSx for Lustre provides storage for compute workloads.

Amazon FSx for lustre is a fully managed high-performance and cost-effective storage.

Option D is INCORRECT.

Amazon Elastic Block Store is a block storage solution and not an NFS file storage solution.

Reference:

https://aws.amazon.com/fsx/windows/ https://aws.amazon.com/efs/ https://aws.amazon.com/fsx/lustre/ https://aws.amazon.com/ebs/

The AWS service that provides a POSIX compliant, fully managed and cost-effective NFS file storage solution is the AWS Elastic File System (EFS).

EFS is a fully managed, scalable, and highly available file storage service for use with Amazon EC2 instances. It provides a POSIX-compliant file system that allows you to store and access files from multiple instances simultaneously. EFS is designed to provide a highly available, scalable, and durable file system that can scale to petabyte-scale storage capacity.

EFS supports the NFSv4 protocol, which is a widely used file access protocol that is compatible with most operating systems. It also supports a range of performance modes that allow you to choose the appropriate balance between performance and cost for your workload.

In contrast, Amazon FSx for Windows File Server is a fully managed Windows file storage service that provides file storage for Windows-based applications. Amazon FSx for Lustre is a high-performance file system designed for compute-intensive workloads. Amazon Elastic Block Store (EBS) is a block-level storage service that is used to store data for EC2 instances.

Therefore, the correct answer to the question is option B, AWS Elastic File System.