- A
Amazon VPC with security groups
Why wrong: Security groups provide network-level access control — they don't provide service mesh capabilities like mutual TLS, traffic shaping, or service-level observability.
- B
AWS App Mesh
App Mesh provides a service mesh layer for microservices with mTLS encryption, traffic control (routing policies, retry logic), and observability (metrics, traces) via Envoy proxy integration.
- C
Amazon API Gateway
Why wrong: API Gateway manages HTTP/HTTPS APIs for external-facing endpoints — it's not a service mesh for internal microservice-to-microservice communication.
- D
AWS Transit Gateway
Why wrong: Transit Gateway routes traffic between VPCs and on-premises networks — it's a network routing hub, not a service mesh for application-level microservice communication.
Quick Answer
The answer is AWS App Mesh. This service provides a service mesh that enables microservices to communicate securely using mutual TLS (mTLS) for encrypted, authenticated traffic between services, while also offering observability through integration with AWS X-Ray and Amazon CloudWatch to track network traffic, metrics, logs, and traces. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of how AWS App Mesh fits into the broader microservices and networking domain, often appearing as a scenario where you need to distinguish it from simpler options like Amazon ECS service discovery or a traditional load balancer. A common trap is confusing App Mesh with AWS PrivateLink or VPC peering, which handle network-level security rather than application-level service mesh capabilities. Remember the memory tip: "App Mesh is the mesh that mends your microservices with mTLS and metrics."
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 adopting microservices and wants to enable their services to communicate securely and track network traffic between them. Which AWS service provides service mesh capabilities with mutual TLS and observability?
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
AWS App Mesh
AWS App Mesh is a service mesh that provides application-level networking, enabling microservices to communicate securely with mutual TLS (mTLS) and offering observability through metrics, logs, and traces. It integrates with AWS services like AWS X-Ray and Amazon CloudWatch to track network traffic between services, making it the correct choice for this requirement.
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.
- ✗
Amazon VPC with security groups
Why it's wrong here
Security groups provide network-level access control — they don't provide service mesh capabilities like mutual TLS, traffic shaping, or service-level observability.
- ✓
AWS App Mesh
Why this is correct
App Mesh provides a service mesh layer for microservices with mTLS encryption, traffic control (routing policies, retry logic), and observability (metrics, traces) via Envoy proxy integration.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon API Gateway
- ✗
AWS Transit Gateway
Why it's wrong here
Transit Gateway routes traffic between VPCs and on-premises networks — it's a network routing hub, not a service mesh for application-level microservice communication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse network-level services like VPC security groups or Transit Gateway with application-level service mesh capabilities, overlooking that mTLS and observability require a dedicated service mesh like AWS App Mesh.
Detailed technical explanation
How to think about this question
AWS App Mesh uses the Envoy proxy as a sidecar to intercept and manage traffic between microservices, enforcing mTLS via AWS Certificate Manager (ACM) or your own certificate authority. It supports the Envoy xDS API for dynamic configuration and integrates with AWS X-Ray for distributed tracing, allowing you to visualize service topology and latency. In a real-world scenario, App Mesh can enforce fine-grained traffic policies like retries, timeouts, and circuit breakers without modifying application code.
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 CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS App Mesh — AWS App Mesh is a service mesh that provides application-level networking, enabling microservices to communicate securely with mutual TLS (mTLS) and offering observability through metrics, logs, and traces. It integrates with AWS services like AWS X-Ray and Amazon CloudWatch to track network traffic between services, making it the correct choice for this requirement.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This CLF-C02 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 CLF-C02 exam.
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