Docker DCA Exam - Topic 4 Question 96 Discussion

Actual exam question for Docker's DCA exam

Question #: 96
Topic #: 4

[All DCA Questions]

A Kubernetes node is allocated a /26 CIDR block (64 unique IPs) for its

address space.

If every pod on this node has exactly two containers in it, how many pods can

this address space support on this node?

A-995

B64

C32 in every Kubernetes namespace

D64 for every service routing to pods on this node

E32

Show Suggested 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

by Alverta at Sep 10, 2024, 03:46 AM

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Martina

3 months ago

I thought it would be more than that, but I guess not.

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Emiko

3 months ago

Definitely 32 pods, simple math!

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Leontine

3 months ago

Wait, how does that work out? Seems off to me.

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Kaitlyn

4 months ago

Totally agree, 32 is the right answer!

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Kassandra

4 months ago

A /26 block gives 64 IPs, so 32 pods max with 2 containers each.

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Jamey

4 months ago

I'm a bit confused about the options. Are we supposed to consider the IPs used by services too, or just the pods?

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Glendora

4 months ago

This question seems familiar; I practiced something similar where we calculated pod limits based on IP allocation. I hope I got it right!

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Leonora

4 months ago

I think we might need to divide the total IPs by the number of containers per pod, which is 2. So, could it be 32 pods?

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Sharee

5 months ago

I remember that a /26 CIDR block gives us 64 IPs, but I'm not sure how many pods we can actually run with two containers each.

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Ilene

5 months ago

Hmm, I'm not sure about this one. I know CIDR blocks and pods, but the interaction between them is tripping me up. I'll have to think it through step-by-step.

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Jeanice

5 months ago

I've got this! The key is that each pod has 2 containers, so the total number of pods is half the number of IPs in the CIDR block. The answer must be 32.

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Gladys

5 months ago

Wait, I'm a bit confused. Does the question mean 32 pods per namespace, or 32 pods total? I need to make sure I understand the requirements.

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Rebecka

5 months ago

Hmm, this looks like a tricky one. I'll need to think through the CIDR block and pod/container relationship carefully.

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Ilene

5 months ago

Okay, let's see. A /26 CIDR block means 64 unique IPs, and each pod has 2 containers. I think I can figure this out.

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Rolland

5 months ago

Alright, time to put my LTE knowledge to the test. I'm pretty confident I can identify the correct statements here. Gonna carefully consider each option and select the ones that accurately describe the protocol architecture.

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Kimberlie

1 year ago

That makes sense, I see your point now.

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Shantell

1 year ago

Haha, -995? Really? That's gotta be a joke option. The node can only support 64 pods, no doubt about it.

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Judy

1 year ago

D: I think it's 64 for every service routing to pods on this node, right?

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Stephaine

1 year ago

C: That's right, each pod having two containers means 32 pods can be supported.

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Sherrell

1 year ago

B: Agreed, the node can only support 64 pods with a /26 CIDR block.

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Brice

1 year ago

A: Yeah, -995 is definitely a joke option. It's 64 pods for sure.

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Alease

1 year ago

I think the answer is D) 64 for every service routing to pods on this node because each service can have multiple pods.

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Justine

1 year ago

Ah, I see what they're trying to do with the 'service routing' option, but that's not really relevant to the question. The answer is definitely 64 pods.

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Estrella

1 year ago

C: That makes sense, 64 is the correct answer.

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Veronika

1 year ago

B: Agreed, each pod has 2 containers so 64 pods can fit in the /26 CIDR block.

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Jettie

1 year ago

A: The answer is definitely 64 pods.

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Ardella

1 year ago

But if every pod has two containers, wouldn't that affect the number of pods that can be supported?

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Lyda

1 year ago

Hmm, I'm not sure about the 'every service routing to pods' part. Isn't the question just about the address space of the node itself?

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Nell

1 year ago

D: I'm not sure, but I think it might be E) 32

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Bette

1 year ago

C: Actually, I believe it's D) 64 for every service routing to pods on this node

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Katina

1 year ago

B: I think it's C) 32 in every Kubernetes namespace

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Cristy

1 year ago

A: B) 64

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Kimberlie

1 year ago

I disagree, I believe the answer is C) 32 in every Kubernetes namespace.

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Lizbeth

1 year ago

Wait, are we supposed to consider the number of namespaces? I'm pretty sure the answer is just 64 pods, not 32 in every namespace.

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Ardella

1 year ago

I think the answer is B) 64.

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Beckie

1 year ago

The correct answer is B) 64. The /26 CIDR block provides 64 unique IP addresses, and since each pod has exactly two containers, the address space can support 64 pods.

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Freeman

1 year ago

B: Oh, I see. Thanks for clarifying!

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Desire

1 year ago

A: The answer is B) 64.

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