- A
Partition placement group and Elastic Network Adapter (ENA) with SR-IOV
Why wrong: Incorrect. Partition placement groups are designed for large distributed systems and do not guarantee the dense, low-latency connectivity needed. ENA with SR-IOV provides enhanced networking but not deterministically low latency.
- B
Spread placement group and EC2 networking with jumbo frames
Correct. Spread placement groups can span Availability Zones, and jumbo frames reduce network overhead, providing deterministic low latency for cross-AZ communication.
- C
Cluster placement group and standard TCP/IP networking
Why wrong: Incorrect. Cluster placement groups are limited to a single Availability Zone, so they cannot meet the cross-AZ requirement. Standard TCP/IP also lacks latency optimizations.
- D
Cluster placement group and Elastic Fabric Adapter (EFA)
Why wrong: Incorrect. Although EFA provides kernel-bypass networking, cluster placement groups cannot span Availability Zones, making this option invalid for the requirement.
ANS-C01 Spread placement group 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. A key principle to apply: spread placement group. 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 designing a network for a real-time financial trading application. The application requires deterministic low-latency connectivity between two EC2 instances in different Availability Zones within the same VPC. Which placement group type and networking feature should the company use?
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
Spread placement group and EC2 networking with jumbo frames
Option B is correct. Spread placement groups can span multiple Availability Zones, meeting the requirement for cross-AZ connectivity. Jumbo frames reduce network overhead and latency by increasing the maximum transmission unit, providing deterministic low latency for real-time financial trading. Other options either use cluster placement groups (limited to a single AZ) or lack the latency benefits of jumbo frames.
Key principle: Spread placement group
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Partition placement group and Elastic Network Adapter (ENA) with SR-IOV
Why it's wrong here
Incorrect. Partition placement groups are designed for large distributed systems and do not guarantee the dense, low-latency connectivity needed. ENA with SR-IOV provides enhanced networking but not deterministically low latency.
- ✓
Spread placement group and EC2 networking with jumbo frames
Why this is correct
Correct. Spread placement groups can span Availability Zones, and jumbo frames reduce network overhead, providing deterministic low latency for cross-AZ communication.
Related concept
Spread placement group
- ✗
Cluster placement group and standard TCP/IP networking
Why it's wrong here
Incorrect. Cluster placement groups are limited to a single Availability Zone, so they cannot meet the cross-AZ requirement. Standard TCP/IP also lacks latency optimizations.
- ✗
Cluster placement group and Elastic Fabric Adapter (EFA)
Why it's wrong here
Incorrect. Although EFA provides kernel-bypass networking, cluster placement groups cannot span Availability Zones, making this option invalid for the requirement.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that many candidates mistakenly assume cluster placement groups can be used across Availability Zones, but they are restricted to a single AZ. The correct answer uses a spread placement group, which can span AZs and, combined with jumbo frames, delivers deterministic low latency.
Detailed technical explanation
How to think about this question
EFA uses a custom OS-bypass network interface that enables high-throughput, low-latency communication by allowing applications to communicate directly with the network hardware without involving the operating system kernel, which is critical for microsecond-level latency. In a cluster placement group, all instances are within a single Availability Zone and logically close to each other, reducing network distance and jitter; EFA further leverages RDMA (Remote Direct Memory Access) over converged Ethernet (RoCEv2) to bypass the TCP/IP stack entirely. Real-world financial trading applications often use EFA with cluster placement groups to achieve sub-100 microsecond latency between instances, which is unattainable with standard networking or other placement group types.
KKey Concepts to Remember
- Spread placement group
- Jumbo frames
- Deterministic low latency
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
Spread placement group
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 spread placement group, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Design — This question tests Network Design — Spread placement group.
What is the correct answer to this question?
The correct answer is: Spread placement group and EC2 networking with jumbo frames — Option B is correct. Spread placement groups can span multiple Availability Zones, meeting the requirement for cross-AZ connectivity. Jumbo frames reduce network overhead and latency by increasing the maximum transmission unit, providing deterministic low latency for real-time financial trading. Other options either use cluster placement groups (limited to a single AZ) or lack the latency benefits of jumbo frames.
What should I do if I get this ANS-C01 question wrong?
Review spread placement group, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Spread placement group
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Last reviewed: Jul 4, 2026
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.
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