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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 175 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 175
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company uses Amazon Route 53 for its DNS needs. The company's security team wants to update the DNS infrastructure to provide the most recent security posture.

The security team has configured DNS Security Extensions (DNSSEC) for the domain. The security team wants a network engineer to explain who is responsible for the rotation of DNSSEC keys.

Which explanation should the network administrator provide to the security team?

  • A. AWS rotates the zone-signing key (ZSK). The company rotates the key-signing key (KSK).
  • B. The company rotates the zone-signing key (ZSK) and the key-signing key (KSK).
  • C. AWS rotates the AWS Key Management Service (AWS KMS) key and the key-signing key (KSK).
  • D. The company rotates the AWS Key Management Service (AWS KMS) key. AWS rotates the key-signing key (KSK).
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Suggested Answer: A 🗳️
by backspace0900 at March 20, 2024, 4:20 a.m.
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backspace0900
Highly Voted 1 year ago
Selected Answer: A
customer KSK AWS ZSK
upvoted 7 times
Kayceetalks
1 year ago
Agreed A, You are responsible for KSK management, which includes rotating it if needed. ZSK management is performed by Route 53. https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-configuring-dnssec.html
upvoted 4 times
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AzureDP900
Most Recent 3 months, 1 week ago
Selected Answer: A
In DNSSEC, Amazon Route 53 handles the rotation of the Zone Signaling Key (ZSK). The ZSK is used to sign the DNS records in a zone and is typically rotated by AWS every 90 days. This ensures that any man-in-the-middle attacks are quickly identified and mitigated. On the other hand, the company's Key Signing Key (KSK) should be rotated regularly, but not automatically by AWS. The KSK is used to sign the ZSKs themselves, and its rotation is typically performed by the company itself, either manually or through automation scripts.
upvoted 1 times
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woorkim
4 months ago
A is answer! There are two kinds of keys in DNSSEC: a key-signing key (KSK) and a zone-signing key (ZSK). In Route 53 DNSSEC signing, each KSK is based on an asymmetric customer managed key in AWS KMS that you own. You are responsible for KSK management, which includes rotating it if needed. ZSK management is performed by Route 53.
upvoted 2 times
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Nodin
1 year ago
Selected Answer: A
AWS rotates ZSK and customer rotates KSK (self managed)
upvoted 1 times
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