- A
Implementing rate limiting on servers
Rate limiting restricts the number of requests from a source.
- B
Disabling all firewall rules
Why wrong: Disabling firewalls worsens the attack.
- C
Allowing all inbound traffic to avoid blocking legitimate users
Why wrong: This would not mitigate the attack.
- D
Filtering traffic based on IP reputation
Blocking known malicious IPs helps reduce attack volume.
- E
Using a Content Delivery Network (CDN) to absorb traffic
CDNs like Cloudflare distribute traffic and absorb DDoS.
Question 714 of 1,000
ISC2 CC Network Security Practice Question
This CC practice question tests your understanding of network security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE of the following are common mitigation techniques against Denial of Service (DoS) attacks?
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
✓
Implementing rate limiting on servers
DoS mitigation includes using DDoS protection services, rate limiting, and filtering traffic based on IP reputation.
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.
- ✓
Implementing rate limiting on servers
Why this is correct
Rate limiting restricts the number of requests from a source.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disabling all firewall rules
Why it's wrong here
Disabling firewalls worsens the attack.
- ✗
Allowing all inbound traffic to avoid blocking legitimate users
Why it's wrong here
This would not mitigate the attack.
- ✓
Filtering traffic based on IP reputation
Why this is correct
Blocking known malicious IPs helps reduce attack volume.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Using a Content Delivery Network (CDN) to absorb traffic
Why this is correct
CDNs like Cloudflare distribute traffic and absorb DDoS.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
Got this wrong? Here's your next step.
Identify which CC 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.
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FAQ
Questions learners often ask
What does this CC question test?
Network Security — This question tests Network Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implementing rate limiting on servers — DoS mitigation includes using DDoS protection services, rate limiting, and filtering traffic based on IP reputation.
What should I do if I get this CC question wrong?
Identify which CC 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This CC practice question is part of Courseiva's free ISC2 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 CC exam.
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