This SSCP practice question tests your understanding of security operations and administration. 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 of the following are types of intrusion detection systems (IDS) based on the detection method?
Anomaly-based IDS
Detects deviations from baseline behavior.
Host-based IDS
Why wrong: This is a deployment type.
Rule-based IDS
Why wrong: Rule-based is a technique within signature-based, not a separate detection method.
Signature-based IDS
Detects known attack patterns via signatures.
Network-based IDS
Why wrong: This is a deployment type, not a detection method.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Anomaly-based IDS
Options B and D are correct. Signature-based detection matches known patterns, and anomaly-based detection identifies deviations from normal behavior. Option A is wrong because network-based refers to placement, not detection method. Option C is wrong because host-based is also placement. Option E is wrong because rule-based is a subset of signature-based.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Anomaly-based IDS
Why this is correct
Detects deviations from baseline behavior.
Related concept
Static NAT maps one inside address to one outside address.
Host-based IDS
Why it's wrong here
This is a deployment type.
Rule-based IDS
Why it's wrong here
Rule-based is a technique within signature-based, not a separate detection method.
Signature-based IDS
Why this is correct
Detects known attack patterns via signatures.
Related concept
Static NAT maps one inside address to one outside address.
Network-based IDS
Why it's wrong here
This is a deployment type, not a detection method.
Common exam traps
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
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.
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
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
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 SSCP NAT questions on configuration and troubleshooting.
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FAQ
Security Operations and Administration — This question tests Security Operations and Administration — Static NAT maps one inside address to one outside address..
The correct answer is: Anomaly-based IDS — Options B and D are correct. Signature-based detection matches known patterns, and anomaly-based detection identifies deviations from normal behavior. Option A is wrong because network-based refers to placement, not detection method. Option C is wrong because host-based is also placement. Option E is wrong because rule-based is a subset of signature-based.
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 SSCP NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
This SSCP 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 SSCP exam.
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