SOA-C02 Networking and Content Delivery Practice Question
This SOA-C02 practice question tests your understanding of networking and content delivery. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Refer to the exhibit. An S3 bucket policy is configured for a CloudFront distribution using an OAI. The policy allows the OAI to get objects. Additionally, it allows anyone from the IP range 203.0.113.0/24 to get objects directly. Users from other IPs report they can still access objects directly via S3 URLs. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The S3 bucket has a bucket ACL that grants public read access.
Option C is correct because the policy allows the OAI, but the second statement allows all principals from a specific IP. The issue is that the policy does not explicitly deny public access; it only allows the OAI and a specific IP range. However, the OAI statement allows the OAI, but if the bucket is not properly configured to block public access, the default may allow public read. Actually, the bucket policy has two Allow statements. The second statement allows all principals from the IP range, but for other IPs, there is no explicit allow or deny. The default is implicit deny, so other IPs should not have access. However, the exhibit shows that users from other IPs can still access. This suggests that the bucket ACL might allow public read, or the bucket policy is not the only access control. Option A is wrong because the OAI is specified. Option B is wrong because the OAI is allowed. Option D is wrong because the policy is valid.
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.
✗
The policy allows public access from the specified IP range, overriding the OAI restriction.
Why it's wrong here
The policy does not override; it adds an allow for that IP.
✗
The OAI is not correctly associated with the CloudFront distribution.
Why it's wrong here
The policy references the OAI correctly.
✗
The CloudFront distribution is using a custom origin instead of S3.
Why it's wrong here
The policy is for an S3 bucket.
✓
The S3 bucket has a bucket ACL that grants public read access.
Why this is correct
Bucket ACLs can grant public access even if the policy restricts.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
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: The S3 bucket has a bucket ACL that grants public read access. — Option C is correct because the policy allows the OAI, but the second statement allows all principals from a specific IP. The issue is that the policy does not explicitly deny public access; it only allows the OAI and a specific IP range. However, the OAI statement allows the OAI, but if the bucket is not properly configured to block public access, the default may allow public read. Actually, the bucket policy has two Allow statements. The second statement allows all principals from the IP range, but for other IPs, there is no explicit allow or deny. The default is implicit deny, so other IPs should not have access. However, the exhibit shows that users from other IPs can still access. This suggests that the bucket ACL might allow public read, or the bucket policy is not the only access control. Option A is wrong because the OAI is specified. Option B is wrong because the OAI is allowed. Option D is wrong because the policy is valid.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Standard ACLs match source addresses.
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