Docker Exam DCA 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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Kimberlie

3 months ago

That makes sense, I see your point now.

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Shantell

3 months 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

2 months ago

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

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Stephaine

2 months ago

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

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Sherrell

2 months ago

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

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Brice

2 months ago

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

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Alease

3 months 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

3 months 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

2 months ago

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

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Veronika

2 months ago

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

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Jettie

2 months ago

A: The answer is definitely 64 pods.

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Ardella

3 months 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

3 months 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

2 months ago

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

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Bette

2 months ago

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

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Katina

2 months ago

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

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Cristy

2 months ago

A: B) 64

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Kimberlie

3 months ago

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

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Lizbeth

3 months 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

3 months ago

I think the answer is B) 64.

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Beckie

3 months 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

3 months ago

B: Oh, I see. Thanks for clarifying!

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Desire

3 months ago

A: The answer is B) 64.

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