ANS-C01 Network Security, Compliance and Governance Practice Question
A company uses AWS WAF to protect their web application. They have a rate-based rule that blocks IPs after 100 requests in 5 minutes. However, they notice that legitimate users behind a corporate NAT gateway are being blocked because the aggregate traffic from the NAT IP exceeds the threshold. Which TWO actions would resolve this issue without compromising security? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a scope-down statement to exclude traffic from the corporate NAT IP range.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Implement a custom WAF rule to allow traffic from the corporate IP range.
Why it's wrong here
This could allow all traffic from that IP, including malicious requests from compromised internal users.
- ✗
Change the rate-based rule to count instead of block.
Why it's wrong here
This would disable blocking altogether, reducing security.
- ✗
Use AWS Shield Advanced for automatic mitigation.
Why it's wrong here
Shield Advanced provides DDoS protection but does not address application-level rate limiting issues.
- ✓
Use a scope-down statement to exclude traffic from the corporate NAT IP range.
Why this is correct
Excluding the known corporate IP range prevents blocking legitimate users.
- ✓
Increase the rate limit threshold to a higher value.
Why this is correct
Increasing the threshold accommodates legitimate aggregate traffic.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.