- A
AWS Global Accelerator
Why wrong: Global Accelerator improves routing performance using the AWS global network but is not a DNS service.
- B
Amazon CloudFront
Why wrong: CloudFront is a CDN for content delivery, not a DNS service.
- C
Amazon Route 53
Route 53 is AWS's managed DNS service, handling domain registration, DNS resolution, and intelligent routing with health checks.
- D
Elastic Load Balancing
Why wrong: ELB distributes traffic to backend targets; it relies on Route 53 for DNS but is not itself a DNS service.
Question 173 of 1,024
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.
Which AWS service provides a domain name system (DNS) that routes end-user requests to AWS infrastructure and external resources?
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
✓
Amazon Route 53
Amazon Route 53 is a highly available and scalable cloud Domain Name System (DNS) web service. It is designed to route end-user requests to AWS infrastructure (such as EC2 instances, ELBs, and S3 buckets) and to external resources by translating human-readable domain names into IP addresses. This directly matches the question's requirement for a DNS-based routing service.
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.
- ✗
AWS Global Accelerator
Why it's wrong here
Global Accelerator improves routing performance using the AWS global network but is not a DNS service.
- ✗
Amazon CloudFront
Why it's wrong here
CloudFront is a CDN for content delivery, not a DNS service.
- ✓
Amazon Route 53
Why this is correct
Route 53 is AWS's managed DNS service, handling domain registration, DNS resolution, and intelligent routing with health checks.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Elastic Load Balancing
Why it's wrong here
ELB distributes traffic to backend targets; it relies on Route 53 for DNS but is not itself a DNS service.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing a content delivery network (CloudFront) or a traffic accelerator (Global Accelerator) with a DNS service, since both can improve performance and route traffic, but only Route 53 provides actual domain name resolution and DNS record management.
Detailed technical explanation
How to think about this question
Route 53 supports multiple routing policies (e.g., simple, weighted, latency-based, geolocation, and failover) that allow fine-grained control over how DNS queries are answered. It also integrates with AWS health checks to automatically route traffic away from unhealthy endpoints, enabling active-passive or active-active failover architectures. Under the hood, Route 53 is an authoritative DNS service that responds to queries over UDP and TCP on port 53, and it supports DNSSEC for added security.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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: Amazon Route 53 — Amazon Route 53 is a highly available and scalable cloud Domain Name System (DNS) web service. It is designed to route end-user requests to AWS infrastructure (such as EC2 instances, ELBs, and S3 buckets) and to external resources by translating human-readable domain names into IP addresses. This directly matches the question's requirement for a DNS-based routing service.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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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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