CV0-004 Deployment Practice Question
A company is migrating 100 TB of data from an on-premises NAS to Amazon S3. The network bandwidth is limited to 100 Mbps, and the transfer must complete within 30 days. Which service should the company use to meet the deadline?
⚠ Common exam trap
CV0-004 often tests the calculation of transfer time versus bandwidth, so candidates who pick DataSync or Direct Connect overlook that the 100 Mbps limit makes network transfer infeasible within the deadline.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Snowball
AWS Snowball is the correct choice because transferring 100 TB over a 100 Mbps link would take far longer than 30 days. At 100 Mbps, the theoretical maximum is about 12.5 MB/s, which over 30 days yields roughly 32 TB, well short of 100 TB. Snowball uses physical devices to ship data, bypassing network bandwidth limitations and meeting the deadline.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS DataSync
Why it's wrong here
DataSync automates and accelerates transfers over the existing network path, so it inherits the same 100 Mbps ceiling and cannot move 100 TB within 30 days. It is tempting because it is the standard online migration service, but it suits smaller datasets or faster links.
- ✗
Amazon S3 Transfer Acceleration
Why it's wrong here
Transfer Acceleration speeds uploads over the public internet using edge locations, but the origin's 100 Mbps uplink remains the bottleneck, so 100 TB still exceeds 30 days. It is tempting because it genuinely accelerates long-distance S3 transfers, but it cannot overcome a constrained source link.
- ✓
AWS Snowball
Why this is correct
At 100 Mbps, transferring 100 TB would take roughly 100 days, far exceeding the 30-day deadline. AWS Snowball ships data physically on a rugged appliance, bypassing the bandwidth constraint entirely, so the migration completes within the required window.
- ✗
AWS Direct Connect
Why it's wrong here
Direct Connect provisions a dedicated private circuit, but its lead time for installation and its port speeds cannot raise throughput beyond the existing 100 Mbps constraint within 30 days. It is tempting as the standard answer for sustained hybrid bandwidth, yet the deadline demands physical shipment instead.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.