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Docker DCA Exam - 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:

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Corrie
3 months ago
Wait, why not just go 4-2-1? That feels safer.
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Becky
3 months ago
Seems like a solid plan to me!
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Shawnna
3 months ago
I thought it should be 2-2-3 instead.
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Antonio
4 months ago
I disagree, 3-3-1 seems unbalanced.
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Nettie
4 months ago
That distribution makes sense for redundancy.
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Avery
4 months ago
I’m not completely sure, but I think having one datacenter with only one manager could lead to issues if it goes down.
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Fanny
4 months ago
I feel like 3-3-1 might leave one datacenter vulnerable. Isn't it better to have at least two in each?
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Emilio
4 months ago
I remember a practice question where we had to distribute resources evenly, but I can't recall the exact numbers.
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Octavio
5 months ago
I think the distribution should be more balanced, like 3-2-2 instead of 3-3-1. Not sure though.
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Rene
5 months ago
Got it, the key is to evenly distribute the managers across the three datacenters or availability zones. 3-3-1 makes sense to me.
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Danica
5 months ago
I'm a bit unsure about this one. Is there a specific reason the solution is 3-3-1? I want to make sure I understand the logic before answering.
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Vicki
5 months ago
The solution says 3-3-1, so I'm guessing that means 3 managers in one datacenter, 3 in another, and 1 in the third. Seems logical.
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Yvonne
5 months ago
Okay, let me see if I can break this down. Seven managers in a swarm cluster, and we need to distribute them across three datacenters or availability zones.
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Denae
5 months ago
Hmm, this seems straightforward. I'll think through it step-by-step to make sure I get the right answer.
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Peggy
10 months ago
A 3-3-1 distribution? That's a lot of managers to keep track of. I hope they have a good head count system.
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Merilyn
9 months ago
No, it might be challenging to keep track of all the managers in different locations.
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Keshia
9 months ago
It does seem like a lot to manage, but having them distributed like that can help with redundancy.
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Lyda
9 months ago
User 3: No
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Cheryl
9 months ago
User 2: I agree, it does seem like a lot to manage
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Dottie
9 months ago
Yes
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Adelle
10 months ago
User 1: Yes
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Erasmo
10 months ago
The 3-3-1 solution seems logical, but I wonder if they're playing a game of 'musical chairs' with the managers.
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Antonio
10 months ago
3-3-1, huh? I guess they're trying to create the 'Three Musketeers' of data centers.
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Lenna
10 months ago
No
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Gladys
10 months ago
That's an interesting way to distribute them!
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Olive
10 months ago
Yes
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Candida
11 months ago
3-3-1 distribution across datacenters? Sounds like a magic trick - now you see them, now you don't!
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Madelyn
9 months ago
No
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Erick
9 months ago
Yes
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Sherell
9 months ago
No
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Mona
10 months ago
Yes
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Cristen
11 months ago
I disagree. I think having all managers in one datacenter would be more efficient for communication and management.
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Rodolfo
11 months ago
I agree with Lavina. Having 3-3-1 distribution makes sense for better fault tolerance.
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Lavina
11 months ago
I think the managers should be distributed evenly across the datacenters.
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