- A
AWS Cloud Map
AWS Cloud Map is a managed service for service discovery, allowing services to register with DNS names and health checks.
- B
Network Load Balancer (NLB)
Why wrong: Network Load Balancer is not required for DNS-based service discovery; it handles TCP/UDP traffic.
- C
Amazon ECS Service Connect
Why wrong: Amazon ECS Service Connect is an optional feature that simplifies service discovery but is not required for DNS-based discovery.
- D
Amazon Route 53
Amazon Route 53 can be configured with private hosted zones to resolve custom DNS names for services.
- E
Application Load Balancer (ALB)
Why wrong: Application Load Balancer provides a DNS name but is not required; service discovery can be achieved with Cloud Map and Route 53 alone.
Question 546 of 1,746
SAP-C02 AWS Cloud Map Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: aWS Cloud Map. 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 new microservices architecture on Amazon ECS with Fargate. The company wants to ensure that services can discover each other using DNS names. Which THREE components are required?
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 Cloud Map
Only AWS Cloud Map (A) and Amazon Route 53 (D) are required for DNS-based service discovery. AWS Cloud Map allows services to register with DNS names and health checks, while Route 53 can be configured with private hosted zones to resolve those DNS names within the VPC. An Application Load Balancer (E) is not required because service discovery can be achieved solely through Cloud Map and Route 53 without any load balancer. ECS Service Connect (C) and Network Load Balancer (B) are also not required for basic DNS-based service discovery.
Key principle: AWS Cloud Map
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 Cloud Map
Why this is correct
AWS Cloud Map is a managed service for service discovery, allowing services to register with DNS names and health checks.
Related concept
AWS Cloud Map
- ✗
Network Load Balancer (NLB)
Why it's wrong here
Network Load Balancer is not required for DNS-based service discovery; it handles TCP/UDP traffic.
- ✗
Amazon ECS Service Connect
Why it's wrong here
Amazon ECS Service Connect is an optional feature that simplifies service discovery but is not required for DNS-based discovery.
- ✓
Amazon Route 53
Why this is correct
Amazon Route 53 can be configured with private hosted zones to resolve custom DNS names for services.
Related concept
AWS Cloud Map
- ✗
Application Load Balancer (ALB)
Why it's wrong here
Application Load Balancer provides a DNS name but is not required; service discovery can be achieved with Cloud Map and Route 53 alone.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often assume an ALB is needed for service discovery due to its DNS name, but Cloud Map and Route 53 alone provide DNS-based discovery without a load balancer.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- AWS Cloud Map
- Amazon Route 53 private hosted zone
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
AWS Cloud Map
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review aWS Cloud Map, then practise related SAP-C02 questions on the same topic to reinforce the concept.
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Continuous Improvement for Existing Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — AWS Cloud Map.
What is the correct answer to this question?
The correct answer is: AWS Cloud Map — Only AWS Cloud Map (A) and Amazon Route 53 (D) are required for DNS-based service discovery. AWS Cloud Map allows services to register with DNS names and health checks, while Route 53 can be configured with private hosted zones to resolve those DNS names within the VPC. An Application Load Balancer (E) is not required because service discovery can be achieved solely through Cloud Map and Route 53 without any load balancer. ECS Service Connect (C) and Network Load Balancer (B) are also not required for basic DNS-based service discovery.
What should I do if I get this SAP-C02 question wrong?
Review aWS Cloud Map, then practise related SAP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS Cloud Map
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Last reviewed: Jun 20, 2026
This SAP-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 SAP-C02 exam.
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