Answer: AWS DataSync over AWS Direct Connect

## Explanation **Correct Answer: B - AWS DataSync over AWS Direct Connect** **Why this is the most reliable solution:** 1. **AWS DataSync vs AWS DMS:** - **AWS DataSync** is specifically designed for transferring large amounts of data between on-premises storage systems and AWS storage services (like Amazon S3). It's optimized for file-based data transfer, which matches the JSON files stored on the SAN. - **AWS Database Migration Service (DMS)** is designed for migrating databases between different database engines, not for transferring files from SAN storage to S3. 2. **Direct Connect vs Public Internet:** - **AWS Direct Connect** provides a dedicated, private network connection from on-premises to AWS, offering: - Higher reliability and consistent network performance - Lower latency - Enhanced security (data doesn't traverse the public internet) - Predictable bandwidth - **Public internet** connections are less reliable, have variable performance, and expose sensitive data to potential security risks. 3. **Requirements alignment:** - **10 TB daily**: Large data volume requires reliable, high-throughput transfer - **JSON files on SAN**: File-based data transfer (DataSync's specialty) - **Critical near-real-time analytics**: Requires reliable, consistent data flow - **Sensitive data**: Security is paramount (Direct Connect provides private connection) **Why other options are incorrect:** - **A (DataSync over public internet)**: Less reliable and less secure than using Direct Connect - **C (DMS over public internet)**: Wrong tool for the job (DMS is for databases, not files) and uses less secure public internet - **D (DMS over Direct Connect)**: Wrong tool for the job, even though it uses the better network connection **Additional considerations:** - DataSync provides built-in encryption, data integrity validation, and incremental transfer capabilities - Direct Connect provides 99.9% availability SLA for dedicated connections - This combination ensures secure, reliable transfer of sensitive instrumentation data for near-real-time analytics

Author: LeetQuiz Editorial Team