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IBM C1000-172 Exam - Topic 3 Question 31 Discussion

Which high availability strategy will result in a maximum of 4 nines (99.99%) of availability for an IBM Kubernetes Services cluster?
D) Multiple worker nodes in at least three availability zones in a single region
A) A single worker node in a single availability zone in a single region
B) Multiple worker nodes in a single availability zone in a single region
C) Multiple worker nodes in at least three availability zones in two or more regions

IBM C1000-172 Exam - Topic 3 Question 31 Discussion

Actual exam question for IBM's C1000-172 exam
Question #: 31
Topic #: 3
[All C1000-172 Questions]

Which high availability strategy will result in a maximum of 4 nines (99.99%) of availability for an IBM Kubernetes Services cluster?

Show Suggested Answer Hide Answer
Suggested Answer: D

To achieve a high availability strategy with a target of four nines (99.99%) for an IBM Kubernetes Services cluster, you need to deploy multiple worker nodes across at least three availability zones within a single region. This configuration ensures that even if one or two zones experience failures, the cluster remains operational, thus meeting the 99.99% uptime objective.

High Availability in IBM Cloud Kubernetes Service: Deploying worker nodes across multiple availability zones provides redundancy and fault tolerance. By having at least three zones, the Kubernetes cluster can tolerate failures in up to two zones while still maintaining functionality.

Comparison of Options:

A (Single worker node in a single zone): Insufficient for high availability as any zone failure would result in downtime.

B (Multiple nodes in a single zone): Provides redundancy but still vulnerable to zone-wide outages, not meeting 99.99% uptime.

C (Multiple nodes in at least three zones across multiple regions): While this offers high availability, it exceeds the requirements stated for achieving 99.99% within a single region.


IBM Kubernetes Service Documentation

IBM Cloud High Availability Best Practices

IBM Cloud Architect Exam Study Guide

Contribute your Thoughts:

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Brent
9 hours ago
I agree, C seems solid. More zones mean less risk of downtime.
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Yen
6 days ago
I think option C is the best choice. Three availability zones are key for high availability.
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Fernanda
11 days ago
Definitely C! More zones mean better redundancy.
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Princess
16 days ago
Wait, how does C guarantee that? Sounds a bit much.
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Elvera
2 months ago
D seems like a solid choice, but I’m not sure about the 4 nines.
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Ernie
2 months ago
I thought B could work too, but I guess not!
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Susana
2 months ago
C is the only option that can give you 4 nines.
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Luisa
3 months ago
Not sure about that, seems a bit optimistic to me.
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Jeniffer
3 months ago
Wait, can we really get 99.99% with just three zones?
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Tonette
3 months ago
Definitely going with C for max availability!
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Claribel
3 months ago
I think D could work too, but not as reliably.
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Antonio
3 months ago
C is the only option that can give you 4 nines.
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Antonio
3 months ago
I’m leaning towards option D since it emphasizes multiple availability zones, but I’m not confident if that alone guarantees four nines.
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Kanisha
4 months ago
I believe option C sounds right because it mentions multiple regions, but I might be mixing it up with another question about disaster recovery strategies.
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Lizette
4 months ago
I practiced a similar question, and I feel like having multiple worker nodes in at least three availability zones is key, but I can't recall if it needs to be in one region or multiple.
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Christoper
4 months ago
I think I remember that to achieve 99.99% availability, you need redundancy across multiple zones, but I'm not sure if it has to be in multiple regions.
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