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Docker DCA Exam - Topic 4 Question 85 Discussion

Actual exam question for Docker's DCA exam
Question #: 85
Topic #: 4
[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 only the tier: frontend label, to a pod bearing the tier: backend label

Show Suggested Answer Hide Answer
Suggested Answer: A

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 only the tier: frontend label to a pod bearing the tier: backend label will be blocked by this networkPolicy1. This is because the networkPolicy does not have a rule allowing ingress from pods with the tier: frontend label1. For more information on Kubernetes NetworkPolicies, you can refer to the Kubernetes Documentation on Network Policies.


by Lenna at Apr 20, 2024, 11:20 PM

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Xuan
4 months ago
Definitely a "No" on this one.
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Kami
5 months ago
Wait, are we sure about that? Seems off.
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Miesha
5 months ago
The policy allows traffic from frontend to backend.
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Annabelle
5 months ago
I think it won't block it, actually.
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Alyssa
5 months ago
Yes, it will block the traffic.
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Vivan
6 months ago
I feel like this could go either way, but I lean towards it not blocking since there might be an allow rule somewhere.
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Cecil
6 months ago
If the policy is correctly configured, it should block the traffic from frontend to backend.
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Joesph
6 months ago
I'm not entirely sure, but I remember a similar question where traffic was blocked based on labels.
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Lemuel
6 months ago
I think the networkPolicy is set to allow traffic only from specific labels, so it might block the request.
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Nan
6 months ago
Ah, I see now. The policy is designed to block that specific traffic flow. I'm feeling more confident in my ability to interpret these Kubernetes network policies.
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Terrilyn
6 months ago
I think I've got it! The 'not' clause is negating the 'tier: backend' label, so the policy will block traffic from pods with the 'tier: frontend' label to pods with the 'tier: backend' label.
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Vernell
6 months ago
Okay, let me take a closer look at the policy. The 'podSelector' and 'ingress' sections seem to be the key parts to focus on.
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Josephine
6 months ago
Hmm, this looks like a tricky one. I'll need to carefully analyze the networkPolicy definition to determine if it will block the traffic.
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Regenia
6 months ago
I'm a bit confused by the 'not' clause in the 'ingress' section. Does that mean the policy will block the traffic or allow it?
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Janey
6 months ago
This is straightforward. The 'syskm' privilege is for key management, so the correct answers are D and F.
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Tresa
6 months ago
Hmm, this seems like a tricky one. I'll need to think carefully about the factors that make output-related pay impractical.
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Paul
6 months ago
Hmm, this looks like a tricky one. I'll need to think through the index options carefully to determine the optimum index for this query.
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Glendora
6 months ago
Pressing the '#' button after the codes could be worth a try, but I'm not sure if that's the best solution. I'll have to weigh the options.
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Mari
2 years ago
The networkPolicy specifies that only pods with 'tier: backend' label can receive traffic from pods with 'tier: frontend' label, so I think it will BLOCK the traffic.
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Stefany
2 years ago
I'm not sure, can someone explain why they think it will BLOCK or not?
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Jovita
2 years ago
I disagree, I believe the networkPolicy will not BLOCK the traffic.
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Mari
2 years ago
I think the networkPolicy will BLOCK the traffic.
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Gracia
2 years ago
No
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Marleen
2 years ago
A) Yes
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Yasuko
2 years ago
Will the networkPolicy BLOCK this traffic?
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