What is split-horizon DNS?

Providing different DNS responses for the same domain based on the source of the query

Using both IPv4 and IPv6 addresses

Splitting a domain into multiple subdomains

Using multiple DNS providers for redundancy

A company runs a web application on two EC2 instances in different Availability Zones. They use a private hosted zone for app.example.com. They want DNS to automatically route traffic to the healthy instance. Which configuration should they use?

Create a weighted routing policy with weights of 50/50 and no health checks.

Create a latency routing policy and rely on Route 53 to detect unhealthy instances.

Create a simple routing policy with multiple records and let Route 53 round-robin between them.

Create a failover routing policy with primary and secondary records, each associated with a health check.

A company has multiple AWS accounts, each with its own VPC. They want to use a single private hosted zone for internal.example.com that is managed centrally in a shared-services account. VPCs in other accounts must be able to resolve records in this zone. Which configuration is required?

Create the private hosted zone in the shared-services account and associate each VPC from the other accounts.

Create a public hosted zone in the shared-services account and use it for internal resolution.

Use Route 53 Resolver outbound endpoints in each VPC to forward queries to the shared-services account.

Create a private hosted zone in each account and replicate the records manually.

What is the role of a health check in a Route 53 DNS failover configuration?

To monitor the health of a resource and determine if it should receive traffic

AWSCertified Advanced Networking - Specialty

Domain 2Objective 3

Task 2.3: Implement Complex Hybrid and Multi-Account DNS Architectures ANS-C01 Practice Questions (Page 5)

Part of the Content Domain 2: Network Implementation domain, which accounts for 26% of the ANS-C01 exam. AWS does not publish an official question count, but from its 170-minute exam (~70–115 total, ~18–30 in this domain), expect 5–8 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

8concepts

26%of the exam

Questions 21–24

21foundation · easy
What is split-horizon DNS?
Select an answer first
22application · medium
A company runs a web application on two EC2 instances in different Availability Zones. They use a private hosted zone for app.example.com. They want DNS to automatically route traffic to the healthy instance. Which configuration should they use?
Select an answer first
23application · medium
A company has multiple AWS accounts, each with its own VPC. They want to use a single private hosted zone for internal.example.com that is managed centrally in a shared-services account. VPCs in other accounts must be able to resolve records in this zone. Which configuration is required?
Select an answer first
24foundation · easy
What is the role of a health check in a Route 53 DNS failover configuration?
Select an answer first

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