Quick Answer
The answer is application whitelisting, as it is the most effective control to prevent unauthorized applications on endpoints. This technical control operates by maintaining a predefined list of approved executables, allowing only those programs to run while blocking all others by default, which directly stops unknown or malicious software from executing. On the Systems Security Certified Practitioner SSCP exam, this concept tests your understanding of endpoint security controls and their distinct roles; a common trap is confusing whitelisting with host-based intrusion detection, which can only detect suspicious activity after it occurs, or relying on antivirus that may miss zero-day threats due to signature gaps. Remember the memory tip: “Whitelist what’s allowed, block the rest”—this contrasts with blacklisting, which is reactive and less comprehensive. For the SSCP, always associate application whitelisting with proactive, prevention-focused security, especially in environments requiring strict control over unauthorized applications.
This SSCP practice question tests your understanding of systems and application 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.
A company wants to prevent unauthorized applications from running on employee workstations. Which of the following is the most effective control?
User training
Why wrong: Training reduces risk but is not a technical prevention control.
Regular antivirus updates
Why wrong: Antivirus relies on signatures and may not prevent unknown threats.
Host-based intrusion detection system
Why wrong: HIDS detects unauthorized activity but does not prevent execution.
Application whitelisting
Whitelisting blocks unapproved applications from running.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Application whitelisting
Application whitelisting allows only approved executables to run, effectively preventing unauthorized applications. Host-based intrusion detection can detect but not prevent. Antivirus relies on signatures and may miss unknown malware. User training is important but not a technical control.
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.
User training
Why it's wrong here
Training reduces risk but is not a technical prevention control.
Regular antivirus updates
Why it's wrong here
Antivirus relies on signatures and may not prevent unknown threats.
Host-based intrusion detection system
Why it's wrong here
HIDS detects unauthorized activity but does not prevent execution.
Application whitelisting
Why this is correct
Whitelisting blocks unapproved applications from running.
Related concept
Static NAT maps one inside address to one outside address.
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
Systems and Application Security — This question tests Systems and Application Security — Static NAT maps one inside address to one outside address..
The correct answer is: Application whitelisting — Application whitelisting allows only approved executables to run, effectively preventing unauthorized applications. Host-based intrusion detection can detect but not prevent. Antivirus relies on signatures and may miss unknown malware. User training is important but not a technical control.
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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