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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 225 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 225
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company is building an internet-facing application that is hosted on an Amazon Elastic Kubernetes Service (Amazon EKS) cluster. The company is using the Amazon VPC Container Network Interface (CNI) plugin for Kubernetes for pod networking connectivity. The company needs to expose its application to the internet by using a Network Load Balancer (NLB).
The pods that host the application must have visibility of the source IP address that is contained in the original packet that the NLB receives.

How should the network engineer configure the NLB and Amazon EKS settings to achieve these goals?

  • A. Specify the ip target type for the NLB. Set the externalTrafficPolicy attribute to Local in the Kubernetes service specification.
  • B. Specify the instance target type for the NLSet the externalTrafficPolicy attribute to Cluster in the Kubernetes service specification.
  • C. Specify the instance target type for the NLB. Set the externalTrafficPolicy attribute to Local in the Kubernetes service specification.
  • D. Specify the ip target type for the NLB. Set the externalTrafficPolicy attribute to Cluster in the Kubernetes service specification.
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Suggested Answer: A 🗳️
by ArunRav at Nov. 19, 2024, 4:26 a.m.
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zanhsieh
3 days, 20 hours ago
Selected Answer: A
https://docs.aws.amazon.com/eks/latest/best-practices/load-balancing.html#:~:text=service.beta.kubernetes.io/aws%2Dload%2Dbalancer%2Dnlb%2Dtarget%2Dtype%3A%20ip https://docs.aws.amazon.com/eks/latest/best-practices/sgpp.html#:~:text=Kubernetes%20services%20support-,externalTrafficPolicy,-%3Dlocal%20to%20support
upvoted 1 times
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woorkim
2 months, 3 weeks ago
Selected Answer: A
To expose an internet-facing application with source IP visibility, use the ip target type for the NLB and set the Kubernetes service's externalTrafficPolicy to Local. This configuration ensures that the original source IP address is preserved and visible to the pods.
upvoted 1 times
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ArunRav
3 months, 4 weeks ago
Selected Answer: A
ip target type make sure that NLB send the traffic to pod ips. externalTrafficPolicy to local will help the pod ips to be shown. Combining both of these options will help to meet the requirements.
upvoted 3 times
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