The answer is a public virtual interface. This is the correct choice because a public virtual interface on AWS Direct Connect provides access to public AWS services, such as Amazon S3, over the private Direct Connect link, bypassing the public internet entirely. A private virtual interface, by contrast, is designed exclusively for accessing resources within a Virtual Private Cloud (VPC), not for reaching public endpoints like S3. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this concept tests your understanding of how Direct Connect virtual interface types map to specific connectivity goals; a common trap is confusing the public VIF’s role with the private VIF’s VPC-only scope. To remember, think: “Public VIF for public services, private VIF for VPCs.”
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. 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 has an AWS Direct Connect connection and wants to use it to access Amazon S3 buckets without traversing the public internet. Which virtual interface type should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Public virtual interface
A public virtual interface (VIF) allows access to public AWS services, including S3, over Direct Connect. A private VIF is for accessing resources in a VPC. A transit VIF is for connecting to a transit gateway. A hosted VIF is provided by an AWS partner.
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.
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Transit virtual interface
Why it's wrong here
Transit VIF is for connecting to a transit gateway.
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Hosted virtual interface
Why it's wrong here
Hosted VIF is a type of virtual interface provided by a partner, but it can be private or public; the question asks which type.
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Private virtual interface
Why it's wrong here
Private VIF is for accessing VPC resources, not public services like S3.
✓
Public virtual interface
Why this is correct
Public VIF provides access to public AWS services over Direct Connect.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Public virtual interface — A public virtual interface (VIF) allows access to public AWS services, including S3, over Direct Connect. A private VIF is for accessing resources in a VPC. A transit VIF is for connecting to a transit gateway. A hosted VIF is provided by an AWS partner.
What should I do if I get this ANS-C01 question wrong?
Identify which ANS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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