SOA-C02 Networking and Content Delivery Practice Question
This SOA-C02 practice question tests your understanding of networking and content delivery. 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 is using Amazon CloudFront to deliver content from an S3 bucket. The SysOps administrator wants to restrict access so that only CloudFront can access the S3 bucket. Which TWO steps should be taken?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the S3 bucket policy to grant the OAI s3:GetObject permission.
Options A and C are correct. Creating an Origin Access Identity (OAI) and granting it read access to the S3 bucket, then configuring the bucket policy to deny all other principals, ensures only CloudFront can access the content. Option B is incorrect because presigned URLs are for individual user access, not for CloudFront origin access. Option D is incorrect because CloudFront signed URLs restrict viewer access, not origin access. Option E is incorrect because bucket policies use OAI, not CloudFront distribution IDs.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Generate presigned URLs for all objects in the S3 bucket.
Why it's wrong here
Presigned URLs grant temporary access to anyone, not restricting to CloudFront.
✓
Configure the S3 bucket policy to grant the OAI s3:GetObject permission.
Why this is correct
This allows CloudFront to read objects while blocking direct S3 access.
Related concept
Standard ACLs match source addresses.
✗
Configure CloudFront signed URLs to limit viewer access.
Why it's wrong here
Signed URLs control viewer access, not origin access.
✓
Create an Origin Access Identity (OAI) for the CloudFront distribution.
Why this is correct
OAI is a special CloudFront identity used to access S3.
Related concept
Standard ACLs match source addresses.
✗
Set the S3 bucket policy to allow access only from the CloudFront distribution ID.
Why it's wrong here
Bucket policies cannot reference CloudFront distribution IDs; they use the OAI.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SOA-C02 ACL questions on filtering logic and placement.
Networking and Content Delivery — This question tests Networking and Content Delivery — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure the S3 bucket policy to grant the OAI s3:GetObject permission. — Options A and C are correct. Creating an Origin Access Identity (OAI) and granting it read access to the S3 bucket, then configuring the bucket policy to deny all other principals, ensures only CloudFront can access the content. Option B is incorrect because presigned URLs are for individual user access, not for CloudFront origin access. Option D is incorrect because CloudFront signed URLs restrict viewer access, not origin access. Option E is incorrect because bucket policies use OAI, not CloudFront distribution IDs.
What should I do if I get this SOA-C02 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SOA-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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