This SCS-C02 practice question tests your understanding of infrastructure security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Network Topology
Refer to the exhibit. A security engineer reviews the AWS WAF web ACL configuration. What is the effect of this configuration?
Network Topology
A
It blocks IPs that send more than 2000 requests and allows requests containing '<script>' in the body.
Correct. The rate-based rule blocks high request rates, and the XSS rule allows the pattern.
B
It allows all traffic because the rules are misconfigured.
Why wrong: The rate-based rule blocks some traffic.
C
It blocks both SQL injection and XSS attacks.
Why wrong: Neither rule effectively blocks SQLi or XSS.
D
It blocks SQL injection attacks and allows XSS attacks.
Why wrong: The first rule is rate-based, not SQLi; the second allows XSS.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It blocks IPs that send more than 2000 requests and allows requests containing '<script>' in the body.
The first rule (SQLiRule) is actually a rate-based rule that blocks IPs exceeding 2000 requests, not SQL injection. The second rule (XSSRule) has an Allow action, which would allow requests containing '<script>' in the body, defeating the purpose of blocking XSS.
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.
✓
It blocks IPs that send more than 2000 requests and allows requests containing '<script>' in the body.
Why this is correct
Correct. The rate-based rule blocks high request rates, and the XSS rule allows the pattern.
Related concept
Standard ACLs match source addresses.
✗
It allows all traffic because the rules are misconfigured.
Why it's wrong here
The rate-based rule blocks some traffic.
✗
It blocks both SQL injection and XSS attacks.
Why it's wrong here
Neither rule effectively blocks SQLi or XSS.
✗
It blocks SQL injection attacks and allows XSS attacks.
Why it's wrong here
The first rule is rate-based, not SQLi; the second allows XSS.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. 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. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Visual reference
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 SCS-C02 ACL questions on filtering logic and placement.
Infrastructure Security — This question tests Infrastructure Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: It blocks IPs that send more than 2000 requests and allows requests containing '<script>' in the body. — The first rule (SQLiRule) is actually a rate-based rule that blocks IPs exceeding 2000 requests, not SQL injection. The second rule (XSSRule) has an Allow action, which would allow requests containing '<script>' in the body, defeating the purpose of blocking XSS.
What should I do if I get this SCS-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 SCS-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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