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Exam AWS Certified Advanced Networking - Specialty ANS-C01 All Questions

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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 53 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 53
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A development team is building a new web application in the AWS Cloud. The main company domain, example.com, is currently hosted in an Amazon Route 53 public hosted zone in one of the company's production AWS accounts.
The developers want to test the web application in the company's staging AWS account by using publicly resolvable subdomains under the example.com domain with the ability to create and delete DNS records as needed. Developers have full access to Route 53 hosted zones within the staging account, but they are prohibited from accessing resources in any of the production AWS accounts.
Which combination of steps should a network engineer take to allow the developers to create records under the example com domain? (Choose two.)

  • A. Create a public hosted zone for example com in the staging account
  • B. Create a staging example.com NS record in the example.com domain. Populate the value with the name servers from the staging.example.com domain. Set the routing policy type to simple routing.
  • C. Create a private hosted zone for staging example com in the staging account.
  • D. Create an example com NS record in the staging example.com domain. Populate the value with the name servers from the example.com domain. Set the routing policy type to simple routing.
  • E. Create a public hosted zone for staging.example.com in the staging account.
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Suggested Answer: BE 🗳️
by zaazanuna at March 19, 2023, 12:56 a.m.
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that1guy
Highly Voted 1 year, 5 months ago
Selected Answer: BE
When a client queries a DNS server for a domain name, the DNS server typically starts by looking for NS records to determine which name servers are authoritative for the domain. The DNS server then queries the authoritative name servers to obtain the information about the domain that the client requested. For example, suppose you own the domain example.com, but you want to delegate control of the subdomain sub.example.com to a different set of name servers. You would create NS records in the example.com zone file that point to the name servers for sub.example.com. This tells DNS servers that the name servers for sub.example.com are authoritative for that subdomain, and they should query those name servers for any requests related to sub.example.com.
upvoted 12 times
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study_aws1
Highly Voted 1 year, 6 months ago
It is a case of sub-domain delegation, not split DNS. Hence, option B) and E) are correct
upvoted 5 times
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vikasj1in
Most Recent 7 months, 1 week ago
Selected Answer: AE
Option A creates a public hosted zone for the main example.com domain in the staging account, giving developers the ability to create records under the example.com domain. Option E creates a separate public hosted zone for staging.example.com in the staging account, providing a dedicated space for developers to create and manage subdomains for testing. Options B, C, and D are not necessary for achieving the goal of allowing developers to create records under the example.com domain in the staging account while being isolated from production AWS accounts.
upvoted 1 times
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marfee
7 months, 2 weeks ago
I think that it's correcty answer is BE.
upvoted 1 times
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Certified101
1 year, 1 month ago
Selected Answer: BE
Options A, C, and D are not correct because they either conflict with the existing Route 53 setup (A), involve creating a private zone which wouldn't be publicly resolvable (C), or reverse the direction of the NS record delegation (D).
upvoted 2 times
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titi_r
1 year, 5 months ago
Selected Answer: BE
B and E - correct. A - incorrect, the Devs must be able to modify the sub-domains of example.com, but not the root domain itself.
upvoted 3 times
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ILOVEVODKA
1 year, 5 months ago
Yea, B and E. https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/CreatingNewSubdomain.html
upvoted 2 times
ILOVEVODKA
1 year, 5 months ago
I will swap to AB
upvoted 1 times
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helloworldabc
1 year, 6 months ago
AAAAAAAABBBBBBB
upvoted 1 times
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zaazanuna
1 year, 6 months ago
A, B - correct. Explanation: Creating a public hosted zone for example.com in the staging account will allow the developers to create DNS records under the example.com domain for testing purposes without impacting the production environment. Creating a staging.example.com NS record in the example.com domain and populating it with the name servers from the staging.example.com domain will delegate authority for the staging.example.com subdomain to the staging account, allowing the developers to create and delete DNS records for that subdomain as needed. The routing policy should be set to simple routing to return the results of the DNS query based on the values in the resource record sets.
upvoted 1 times
rhinozD
1 year, 4 months ago
No, A is wrong. If you want a public sub-domain in the staging account. You have to create that sub-domain public hosted zone in the staging account, NOT recreate the domain in the product account(example.com.)
upvoted 1 times
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