ANS-C01 Network Management and Operations Practice Question
A network engineer is designing a multi-region application that requires low-latency traffic between EC2 instances in two different AWS Regions. The engineer needs to ensure that traffic between the instances uses the AWS global network and not the public internet. Which AWS service should be used?
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
✓
VPC Peering
(VPC Peering). Inter-region VPC peering connects VPCs in different regions using the AWS global network backbone, providing low-latency and private connectivity between EC2 instances. Option A (AWS Direct Connect) is used for on-premises to AWS connectivity, not between instances. Option B (AWS Global Accelerator) optimizes internet-facing traffic and adds unnecessary hops for internal traffic. Option C (AWS Transit Gateway) supports inter-region transit but requires additional configuration and is not the simplest solution for direct instance-to-instance connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Direct Connect
Why it's wrong here
AWS Direct Connect is used for dedicated on-premises connectivity to AWS, not for connecting EC2 instances across regions.
- ✗
AWS Global Accelerator
Why it's wrong here
AWS Global Accelerator is designed to improve performance for internet-facing applications by routing traffic over the AWS global network, but it adds unnecessary latency for direct instance-to-instance traffic within AWS.
- ✗
AWS Transit Gateway
Why it's wrong here
Transit Gateway inter-region peering routes traffic across the AWS global network but lacks any latency-optimisation mechanism; it forwards via a static hub, not via edge-location anycast. The scenario demands the lowest possible latency between two EC2 instances, which is achieved by AWS Global Accelerator’s dynamic path selection from edge points. Transit Gateway is tempting as it is widely used for hub-and-spoke connectivity across regions when many VPCs require centralised routing.
- ✓
VPC Peering
Why this is correct
Inter-region VPC peering uses the AWS global network backbone to provide low-latency, private connectivity between EC2 instances in different regions, making it the correct choice.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.