The answer is deploying sensors at network choke points and using tap or SPAN ports for passive monitoring. These two practices are considered best for NIDS deployment because placing sensors at choke points—such as core switches or internet gateways—ensures full visibility of all traffic traversing the network, while passive monitoring via taps or SPAN ports avoids introducing latency or creating a single point of failure. On the Cisco CyberOps Associate 200-201 exam, this concept tests your understanding of how detection systems must balance coverage with network integrity; a common trap is assuming sensors should be placed behind firewalls or run inline, but the exam emphasizes that inline mode can degrade performance and is not required for detection. Remember the memory tip: “Choke points for eyes, taps for no lies”—sensors at choke points see everything, and passive taps keep the network honest without slowing it down.
200-201 Security Monitoring Practice Question
This 200-201 practice question tests your understanding of security monitoring. 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 two are best practices for deploying network-based intrusion detection systems? (Choose two.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use tap or SPAN ports to ensure traffic visibility.
Options A and B are correct. Deploying sensors at network choke points ensures visibility of all traffic, and using tap or SPAN ports allows passive monitoring without introducing latency or failure points. Option C is not a best practice because placing sensors behind firewalls may miss attacks that never reach the firewall. Option D is not always appropriate as inline mode can introduce latency and is not required for detection. Option E would generate excessive false positives.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Place sensors behind firewalls to reduce false positives.
Why it's wrong here
This can miss attacks that bypass or target the firewall.
✗
Enable all signatures to maximize detection.
Why it's wrong here
Enabling all signatures leads to high false positive rates.
✓
Use tap or SPAN ports to ensure traffic visibility.
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 200-201 NAT questions on configuration and troubleshooting.
Security Monitoring — This question tests Security Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use tap or SPAN ports to ensure traffic visibility. — Options A and B are correct. Deploying sensors at network choke points ensures visibility of all traffic, and using tap or SPAN ports allows passive monitoring without introducing latency or failure points. Option C is not a best practice because placing sensors behind firewalls may miss attacks that never reach the firewall. Option D is not always appropriate as inline mode can introduce latency and is not required for detection. Option E would generate excessive false positives.
What should I do if I get this 200-201 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 200-201 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.