The answer is to use Amazon EC2 Dedicated Hosts to mitigate CPU stealing. Dedicated Hosts provide a physical server fully dedicated to your use, ensuring that no other AWS instances share the same underlying hardware, which eliminates the resource contention known as the noisy neighbor problem that causes variable CPU performance. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of isolation mechanisms for latency-sensitive workloads; a common trap is confusing placement groups, which improve network throughput and latency but do not prevent CPU stealing, or assuming that a larger instance type like C5 inherently avoids co-tenancy. Remember the key distinction: Dedicated Hosts give you full control over physical server placement, while Dedicated Instances only offer single-tenant billing without host-level visibility. Memory tip: “Host stops the ghost” — a Dedicated Host banishes the noisy neighbor ghost from your CPU.
SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 a critical application to AWS. The application requires consistent performance and low latency. The company has selected an instance type that meets the performance requirements. However, during testing, the application experiences variable performance due to CPU stealing from other instances on the same physical host. What should the company do to mitigate this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon EC2 Dedicated Hosts for the instances
Option A is correct: Dedicated Hosts provide dedicated physical servers, eliminating CPU stealing. Option B (placement group) helps with network performance, not CPU isolation. Option C (T2/T3 unlimited) is for burstable instances, not dedicated. Option D (C5 instance) does not prevent CPU stealing.
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.
✓
Use Amazon EC2 Dedicated Hosts for the instances
Why this is correct
Dedicated Hosts provide physical isolation, eliminating CPU stealing.
Related concept
Static NAT maps one inside address to one outside address.
✗
Launch instances in a cluster placement group
Why it's wrong here
Cluster placement groups improve network performance, not CPU isolation.
✗
Use T2 or T3 instances with the unlimited credit option
Why it's wrong here
Unlimited credits affect bursting, not CPU stealing from other instances.
✗
Switch to a compute-optimized instance type such as C5
Why it's wrong here
Changing instance type does not prevent CPU stealing; physical host is still shared.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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 SAP-C02 NAT questions on configuration and troubleshooting.
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use Amazon EC2 Dedicated Hosts for the instances — Option A is correct: Dedicated Hosts provide dedicated physical servers, eliminating CPU stealing. Option B (placement group) helps with network performance, not CPU isolation. Option C (T2/T3 unlimited) is for burstable instances, not dedicated. Option D (C5 instance) does not prevent CPU stealing.
What should I do if I get this SAP-C02 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 SAP-C02 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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