The answer is AWS Snowball Edge. This service is the correct choice because it provides a ruggedized physical device that can be shipped to your on-premises data center, allowing you to load petabytes of data locally and ship it back to AWS for ingestion into Amazon S3, completely bypassing a slow network connection. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of hybrid storage migration and when to choose offline data transfer over online methods like AWS DataSync or AWS Direct Connect. A common trap is selecting AWS Storage Gateway, but that still relies on network connectivity for caching, whereas Snowball Edge is purpose-built for massive, time-sensitive transfers when the network is too slow. Memory tip: think of Snowball as a “snowball fight” against slow networks—you physically throw the data at AWS instead of sending it through a pipe.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company needs to transfer petabytes of data from an on-premises data center to Amazon S3. The network connection is too slow for online transfer and the data must arrive within two weeks. Which AWS service is most appropriate?
Why wrong: DataSync transfers data over the network and would be too slow for petabytes on a constrained connection.
B
AWS Direct Connect
Why wrong: Direct Connect provides a dedicated network connection but provisioning takes weeks and transfer time for petabytes would still be significant.
C
AWS Snowball Edge
Snowball Edge ships physical storage devices to the customer, data is loaded offline, and devices are returned to AWS for import — ideal for petabyte-scale migrations.
D
Amazon S3 Transfer Acceleration
Why wrong: S3 Transfer Acceleration improves upload speed over the internet but still requires network bandwidth — insufficient for petabytes on slow connections.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Snowball Edge
AWS Snowball Edge is the most appropriate service because it provides physical storage devices that can be shipped to the on-premises data center, allowing petabyte-scale data to be loaded locally and shipped back to AWS, bypassing slow network connections entirely. This meets the two-week deadline since network transfer would be infeasible at that scale over a slow link.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 transfers data over the network and would be too slow for petabytes on a constrained connection.
✗
AWS Direct Connect
Why it's wrong here
Direct Connect provides a dedicated network connection but provisioning takes weeks and transfer time for petabytes would still be significant.
✓
AWS Snowball Edge
Why this is correct
Snowball Edge ships physical storage devices to the customer, data is loaded offline, and devices are returned to AWS for import — ideal for petabyte-scale migrations.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon S3 Transfer Acceleration
Why it's wrong here
S3 Transfer Acceleration improves upload speed over the internet but still requires network bandwidth — insufficient for petabytes on slow connections.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose AWS DataSync or S3 Transfer Acceleration because they focus on 'fast transfer' without recognizing that physical shipment is the only viable method when the network is too slow for petabyte-scale data within a strict deadline.
Detailed technical explanation
How to think about this question
AWS Snowball Edge devices use AES-256 encryption for data at rest and TLS for data in transit during the import process, with the device acting as a local storage endpoint that can be connected via 10GbE or 25GbE interfaces. Under the hood, the device runs a modified version of Amazon S3 API, allowing direct use of existing S3 tools and scripts, and supports clustering multiple devices for larger datasets. A real-world scenario is a media company migrating hundreds of terabytes of video archives where even a 1 Gbps link would take weeks, but Snowball Edge can complete the transfer in days including shipping time.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Snowball Edge — AWS Snowball Edge is the most appropriate service because it provides physical storage devices that can be shipped to the on-premises data center, allowing petabyte-scale data to be loaded locally and shipped back to AWS, bypassing slow network connections entirely. This meets the two-week deadline since network transfer would be infeasible at that scale over a slow link.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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