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Docker Exam DCA Topic 5 Question 105 Discussion

Actual exam question for Docker's DCA exam
Question #: 105
Topic #: 5
[All DCA Questions]

Seven managers are in a swarm cluster.

Is this how should they be distributed across three datacenters or availability zones?

Solution: 3-3-1

Show Suggested Answer Hide Answer
Suggested Answer: E

A Kubernetes node is allocated a /26 CIDR block (64 unique IPs) for its address space. This means that the node can assign up to 64 IP addresses to its resources, such as pods and containers. If every pod on this node has exactly two containers in it, then each pod will need two IP addresses, one for each container. Therefore, the node can support up to 32 pods, since 64 / 2 = 32. The other options are incorrect because they either exceed the available IP addresses or do not account for the number of containers per pod. Reference:

* CIDR Blocks and Container Engine for Kubernetes - Oracle

* How kubernetes assigns podCIDR for nodes? - Stack Overflow


Contribute your Thoughts:

Antonio
13 days ago
3-3-1, huh? I guess they're trying to create the 'Three Musketeers' of data centers.
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Candida
18 days ago
3-3-1 distribution across datacenters? Sounds like a magic trick - now you see them, now you don't!
upvoted 0 times
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Cristen
21 days ago
I disagree. I think having all managers in one datacenter would be more efficient for communication and management.
upvoted 0 times
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Rodolfo
22 days ago
I agree with Lavina. Having 3-3-1 distribution makes sense for better fault tolerance.
upvoted 0 times
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Lavina
22 days ago
I think the managers should be distributed evenly across the datacenters.
upvoted 0 times
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