This PAS-C01 practice question tests your understanding of migration. 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.
A company is migrating on-premises servers to AWS. After migrating, the administrator runs the AWS CLI command shown in the exhibit. The company wants to ensure that all EC2 instances are in the 'running' state. Which action should the administrator take?
Run aws ec2 start-instances --instance-ids i-1a2b3c4d5e6f7g8h
Starts the stopped instance.
Run aws ec2 stop-instances --instance-ids i-0a1b2c3d4e5f6g7h
Why wrong: Would stop a running instance.
Run aws ec2 reboot-instances --instance-ids i-2a3b4c5d6e7f8g9h
Why wrong: Would reboot a running instance.
Run aws ec2 terminate-instances --instance-ids i-2a3b4c5d6e7f8g9h
Why wrong: Would terminate a running instance.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Run aws ec2 start-instances --instance-ids i-1a2b3c4d5e6f7g8h
The instance i-1a2b3c4d5e6f7g8h is stopped. The administrator needs to start it using the start-instances command. Option A (stop-instances) would stop running instances. Option C (terminate-instances) would delete instances. Option D (reboot-instances) would reboot.
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.
Run aws ec2 start-instances --instance-ids i-1a2b3c4d5e6f7g8h
Why this is correct
Starts the stopped instance.
Related concept
Static NAT maps one inside address to one outside address.
Run aws ec2 stop-instances --instance-ids i-0a1b2c3d4e5f6g7h
Why it's wrong here
Would stop a running instance.
Run aws ec2 reboot-instances --instance-ids i-2a3b4c5d6e7f8g9h
Why it's wrong here
Would reboot a running instance.
Run aws ec2 terminate-instances --instance-ids i-2a3b4c5d6e7f8g9h
Why it's wrong here
Would terminate a running instance.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 PAS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Migration — This question tests Migration — Static NAT maps one inside address to one outside address..
The correct answer is: Run aws ec2 start-instances --instance-ids i-1a2b3c4d5e6f7g8h — The instance i-1a2b3c4d5e6f7g8h is stopped. The administrator needs to start it using the start-instances command. Option A (stop-instances) would stop running instances. Option C (terminate-instances) would delete instances. Option D (reboot-instances) would reboot.
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 PAS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services 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 PAS-C01 exam.
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