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Network Design →mediumMultiple ChoiceObjective-mapped

ANS-C01 Network Design Practice Question

This ANS-C01 practice question tests your understanding of network design. 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 deploying an application that requires low-latency communication between EC2 instances in two different AWS Regions. The application traffic is latency-sensitive and the company wants to minimize jitter. Which network design provides the lowest and most consistent latency?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

Question 1mediummultiple choice

Full question →

A
Create a VPC peering connection between the two VPCs and route traffic through the peering connection.
Why wrong: VPC peering does not support inter-region peering? Actually it does, but traffic traverses the AWS backbone, but still may not be optimized for latency. Global Accelerator is better.
B
Use internet gateways and route traffic over the public internet between the instances.
Why wrong: Public internet introduces variable latency and jitter.
C
Use a Site-to-Site VPN connection between the two VPCs over the internet.
Why wrong: VPN adds latency due to encryption and uses the public internet which is variable.
D
Deploy an AWS Global Accelerator with endpoints in both Regions and use the accelerator's static IP addresses for communication.
Global Accelerator uses the AWS global network to route traffic over optimized paths, reducing latency and jitter.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Deploy an AWS Global Accelerator with endpoints in both Regions and use the accelerator's static IP addresses for communication.

AWS Global Accelerator uses the AWS global network and Anycast static IP addresses to route traffic over optimized paths, providing lower and more consistent latency than VPC peering, internet transit, or VPNs. It minimizes jitter by avoiding the public internet and leveraging AWS's internal backbone, which is ideal for latency-sensitive inter-Region communication.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Create a VPC peering connection between the two VPCs and route traffic through the peering connection.
Why it's wrong here
VPC peering does not support inter-region peering? Actually it does, but traffic traverses the AWS backbone, but still may not be optimized for latency. Global Accelerator is better.
✗
Use internet gateways and route traffic over the public internet between the instances.
Why it's wrong here
Public internet introduces variable latency and jitter.
✗
Use a Site-to-Site VPN connection between the two VPCs over the internet.
Why it's wrong here
VPN adds latency due to encryption and uses the public internet which is variable.
✓
Deploy an AWS Global Accelerator with endpoints in both Regions and use the accelerator's static IP addresses for communication.
Why this is correct
Global Accelerator uses the AWS global network to route traffic over optimized paths, reducing latency and jitter.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume VPC peering (Option A) is the best for inter-Region traffic because it's private, but they overlook that Global Accelerator provides superior latency consistency by using anycast and AWS's optimized backbone, while VPC peering still routes through the AWS global network without traffic engineering for jitter reduction.

Detailed technical explanation

How to think about this question

AWS Global Accelerator uses Anycast IPs to direct traffic to the nearest edge location, then routes it over the AWS global backbone to the optimal endpoint, avoiding internet congestion and BGP path changes. Under the hood, it leverages the same infrastructure as AWS CloudFront but with TCP/UDP termination at edge locations and dynamic endpoint weighting, ensuring sub-50ms failover and consistent latency. In real-world scenarios, this is critical for real-time gaming or financial trading where jitter above 10ms can degrade performance.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this ANS-C01 question test?

Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Deploy an AWS Global Accelerator with endpoints in both Regions and use the accelerator's static IP addresses for communication. — AWS Global Accelerator uses the AWS global network and Anycast static IP addresses to route traffic over optimized paths, providing lower and more consistent latency than VPC peering, internet transit, or VPNs. It minimizes jitter by avoiding the public internet and leveraging AWS's internal backbone, which is ideal for latency-sensitive inter-Region communication.

What should I do if I get this ANS-C01 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This ANS-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 ANS-C01 exam.