CV0-004 Deployment Practice Question
A cloud administrator needs to transfer 50 TB of data from an on-premises NAS to Amazon S3. The office has limited bandwidth (50 Mbps). Which service is most suitable for this offline transfer?
⚠ Common exam trap
CV0-004 often tests whether candidates pick online transfer services (DataSync, Transfer Acceleration) for scenarios where bandwidth makes network transfer impractical, missing the cue that 'offline' and 'limited bandwidth' point to Snowball.
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 a physical petabyte-scale data transport device designed for offline data migration when network bandwidth is insufficient. With 50 TB of data and only 50 Mbps bandwidth, transferring over the network would take months (roughly 100+ days), making Snowball the appropriate choice for offline transfer to S3.
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 VPN
Why it's wrong here
AWS VPN provides encrypted connectivity over the internet, so it still depends on the 50 Mbps office link and cannot move 50 TB promptly. It suits secure site-to-site or client access, not bulk offline migration. AWS Snowball ships the data physically.
- ✗
AWS DataSync
Why it's wrong here
AWS DataSync transfers data over the network, so 50 TB across a 50 Mbps link would take weeks. It suits ongoing or scheduled online replication between stores. The stem specifies offline transfer, which AWS Snowball satisfies by shipping a physical device.
- ✓
AWS Snowball
Why this is correct
AWS Snowball provides a physical appliance for offline bulk data transfer, bypassing the 50 Mbps bandwidth constraint that would make 50 TB take months to upload. Data is shipped to AWS and imported into S3.
- ✗
S3 Transfer Acceleration
Why it's wrong here
S3 Transfer Acceleration speeds uploads over the public internet via edge locations, which still traverses the constrained 50 Mbps link. It suits accelerating online transfers, not bypassing bandwidth limits. Offline shipping via AWS Snowball physically moves the data.
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.