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Docker DCA Exam - Topic 5 Question 108 Discussion

Actual exam question for Docker's DCA exam
Question #: 108
Topic #: 5
[All DCA Questions]

The Kubernetes yaml shown below describes a networkPolicy.

Will the networkPolicy BLOCK this trafftc?

Solution. a request issued from a pod bearing the tier: api label, to a pod bearing the tier: backend label

Show Suggested Answer Hide Answer
Suggested Answer: B

The provided Kubernetes NetworkPolicy YAML configuration indicates that the policy applies to pods with the label tier: backend in the default namespace1. The ingress rule allows traffic from pods with the label tier: api1. Therefore, a request issued from a pod bearing the tier: api label to a pod bearing the tier: backend label will not be blocked by this networkPolicy1. This is because the networkPolicy explicitly allows ingress from pods with the tier: api label1. For more information on Kubernetes Network


by Maryanne at Mar 08, 2025, 11:58 AM

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Quiana
4 months ago
Seems like it should allow the traffic.
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Velda
5 months ago
Wait, are you sure about that?
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William
5 months ago
Definitely blocks it!
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Felton
5 months ago
I think it won't block it.
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Solange
5 months ago
Yes, it will block the traffic.
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Carey
5 months ago
From what I recall, if the policy doesn't explicitly allow traffic from the api tier to the backend tier, it should block it. But I could be wrong.
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Lisha
6 months ago
I'm a bit confused about how the labels interact in this case. Does the policy block traffic only if both labels are present?
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Iola
6 months ago
I remember a similar question where we had to determine if a policy allowed or blocked traffic based on labels. I think it was about ingress rules.
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Eileen
6 months ago
I think the network policy is meant to restrict traffic, but I'm not entirely sure if it applies to all labels or just specific ones.
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Avery
6 months ago
Okay, let me walk through this step-by-step. The policy is allowing ingress traffic from pods with the 'tier: api' label to pods with the 'tier: backend' label. So the answer is no, it will not block that traffic.
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Avery
6 months ago
I've got a good feeling about this one. The policy is clearly allowing the traffic from the 'api' tier to the 'backend' tier, so the answer should be no, it won't block that traffic.
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Melodie
6 months ago
Wait, I'm a bit confused. The policy is allowing that traffic, not blocking it, right? I'll need to double-check the Kubernetes documentation to make sure I understand this correctly.
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Katina
6 months ago
Okay, let me see here. The policy is allowing ingress traffic from pods with the 'tier: api' label to pods with the 'tier: backend' label. I think the answer is yes, it will block that traffic.
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Shayne
6 months ago
Hmm, this looks like a tricky one. I'll need to carefully review the Kubernetes YAML and think through the network policy rules.
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Chaya
1 year ago
Haha, the Kubernetes folks sure love to make things complicated, don't they? I'm going with B) No, just to keep things simple.
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Sylvia
11 months ago
User1: Let's go with B) No then.
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Bette
11 months ago
User3: I'm leaning towards B) No as well.
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Leslie
11 months ago
User2: I agree, but I think the answer is B) No.
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Carmen
11 months ago
User1: Yeah, Kubernetes yaml can be a bit overwhelming.
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Sharika
1 year ago
Wait, what? This question is making my head spin. I need to take a break and get some coffee before I tackle this one.
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Linwood
1 year ago
I think the answer is B) No. The networkPolicy doesn't seem to have any rules that would block traffic from the 'api' pods to the 'backend' pods.
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Daren
11 months ago
User 3: So, we all think it won't block the traffic then?
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Marge
1 year ago
User 2: Yeah, I agree. There doesn't seem to be any rules blocking that traffic.
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Gussie
1 year ago
User 1: I think the answer is B) No.
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Claribel
1 year ago
Hmm, I see your point. Maybe I misunderstood the yaml configuration.
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Yvette
1 year ago
I agree with Audria, the networkPolicy seems to be configured to block the traffic.
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Audria
1 year ago
But the solution mentions that it will block traffic between pods with specific labels.
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Dell
1 year ago
Hmm, this looks like a trick question. The networkPolicy description doesn't specify the direction of the traffic, so I'm not sure if it will block the traffic or not.
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Kristel
1 year ago
I think it might block the traffic because it specifies the source and destination pods.
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Antione
1 year ago
I agree, it's not clear from the description. It could go either way.
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Phuong
1 year ago
B) No
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Elin
1 year ago
A) Yes
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Claribel
1 year ago
I disagree, I believe the networkPolicy will not block the traffic.
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Audria
1 year ago
I think the networkPolicy will block the traffic.
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