The correct answer is that the policy denies terminating instances from all IP addresses except 10.0.0.0/8. This is because the IAM policy evaluation logic uses an explicit deny that overrides any allow, and here the Deny effect is triggered when the source IP condition is not in the 10.0.0.0/8 range, effectively blocking ec2:TerminateInstances from any external network. On the Certified Associate in Project Management CAPM exam, this tests your understanding of how conditional deny statements work in IAM policies, often appearing in scenario-based questions where you must parse the effect of a NotIpAddress condition. A common trap is misreading the “Deny” as an “Allow” when the condition is inverted, so remember that “Deny + NotIpAddress” means “block everything except this range.” For a quick memory tip, think of it as the “bouncer rule”: the policy denies entry to everyone not on the VIP list, so only the 10.0.0.0/8 network gets through.
CAPM Predictive Plan-Based Methodologies Practice Question
This CAPM practice question tests your understanding of predictive plan-based methodologies. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Denies terminating instances from all IP addresses except 10.0.0.0/8.
The policy denies ec2:TerminateInstances when the source IP is NOT in the 10.0.0.0/8 range. Thus, it denies termination from outside that network.
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.
✗
Denies terminating instances from the 10.0.0.0/8 network.
Why it's wrong here
The condition uses StringNotEquals, so it denies when not equal to 10.0.0.0/8, not when equal.
✓
Denies terminating instances from all IP addresses except 10.0.0.0/8.
Why this is correct
Correct: The Deny applies when the source IP is not equal to 10.0.0.0/8.
Related concept
Static NAT maps one inside address to one outside address.
✗
Allows terminating instances only from the 10.0.0.0/8 network.
Why it's wrong here
The policy is a Deny, not an Allow; it does not explicitly allow anything.
✗
Allows terminating instances from any IP address.
Why it's wrong here
The policy applies a Deny, so it restricts, not allows.
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 CAPM NAT questions on configuration and troubleshooting.
Predictive Plan-Based Methodologies — This question tests Predictive Plan-Based Methodologies — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Denies terminating instances from all IP addresses except 10.0.0.0/8. — The policy denies ec2:TerminateInstances when the source IP is NOT in the 10.0.0.0/8 range. Thus, it denies termination from outside that network.
What should I do if I get this CAPM 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 CAPM NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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