Juniper JN0-214 Exam - Topic 5 Question 1 Discussion

Actual exam question for Juniper's JN0-214 exam

Question #: 1
Topic #: 5

Which two statements are correct about Kubernetes resources? (Choose two.)

AA ClusterIP type service can only be accessed within a Kubernetes cluster.

BA daemonSet ensures that a replica of a pod is running on all nodes.

CA deploymentConfig is a Kubernetes resource.

DNodePort service exposes the service externally by using a cloud provider load balancer.

DNodePort service exposes the service externally by using a cloud provider load balancer.
Incorrect:
A NodePort service exposes the service on a static port on each node in the cluster, allowing external access via the node's IP address and the assigned port. However, it does not use a cloud provider load balancer. The LoadBalancer service type is the one that leverages cloud provider load balancers for external access.
Why These Statements?
ClusterIP: Ensures internal-only communication, making it suitable for backend services that do not need external exposure.
DaemonSet: Guarantees that a specific pod runs on all nodes, ensuring consistent functionality across the cluster.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Kubernetes resources and their functionalities, including services, DaemonSets, and Deployments. Understanding these concepts is essential for managing Kubernetes clusters effectively.
For example, Juniper Contrail integrates with Kubernetes to provide advanced networking features for services and DaemonSets, ensuring seamless operation of distributed applications.

Show Suggested Answer

Suggested Answer: A, B

Kubernetes resources are the building blocks of Kubernetes clusters, enabling the deployment and management of applications. Let's analyze each statement:

A . A ClusterIP type service can only be accessed within a Kubernetes cluster.

Correct:

A ClusterIP service is the default type of Kubernetes service. It exposes the service internally within the cluster, assigning it a virtual IP address that is accessible only to other pods or services within the same cluster. External access is not possible with this service type.

B . A daemonSet ensures that a replica of a pod is running on all nodes.

Correct:

A daemonSet ensures that a copy of a specific pod is running on every node in the cluster (or a subset of nodes if specified). This is commonly used for system-level tasks like logging agents or monitoring tools that need to run on all nodes.

C . A deploymentConfig is a Kubernetes resource.

Incorrect:

deploymentConfig is a concept specific to OpenShift, not standard Kubernetes. In Kubernetes, the equivalent resource is called a Deployment , which manages the desired state of pods and ReplicaSets.

Kubernetes Documentation: Services, DaemonSets, and Deployments

Juniper JNCIA-Cloud Study Guide: Kubernetes Resources

by Dong at Feb 07, 2025, 10:36 PM

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Roxane

3 months ago

Yeah, ClusterIP is perfect for backend services!

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Sophia

3 months ago

I thought NodePort used load balancers too, guess I was wrong!

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Sage

3 months ago

Wait, isn't a deploymentConfig a specific OpenShift thing?

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Lashonda

4 months ago

Totally agree, DaemonSets are key for node consistency.

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Catrice

4 months ago

A ClusterIP service is definitely internal only!

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Theola

4 months ago

I’m pretty confident that a DaemonSet runs a pod on all nodes, but I need to double-check if that’s the same as a deployment.

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Georgeanna

4 months ago

I feel like deploymentConfig might be a term from OpenShift, not standard Kubernetes. Is that correct?

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Natalie

4 months ago

I remember practicing a question about NodePort services, and I think it’s not the one that uses a load balancer, right?

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Hortencia

5 months ago

I think ClusterIP is definitely for internal access only, but I'm not entirely sure about the specifics of DaemonSets.

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Stevie

5 months ago

Okay, I've got a good handle on the Kubernetes resources now. I'm confident I can identify the two correct statements from the options provided.

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Mireya

5 months ago

Hmm, I'm a bit unsure about the NodePort service. I know it exposes the service externally, but I'm not sure about the details of how it does that. I'll need to think this through carefully.

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Alida

5 months ago

I'm familiar with ClusterIP and DaemonSet, so I think I can handle this one. Let me review the other options quickly to confirm my understanding.

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Aretha

5 months ago

This question seems straightforward, but I want to make sure I understand the differences between the Kubernetes resource types before selecting the correct answers.

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Colette

12 months ago

I heard Kubernetes is so complicated, they have to make the certification exams as confusing as possible. If you can't handle a few trick questions, how can you manage a real cluster?

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Margurite

12 months ago

D is clearly the other correct answer. NodePort services are a great way to expose apps to the outside world, even if they don't use a cloud load balancer.

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Madelyn

11 months ago

That's correct. ClusterIP services are for internal communication within the Kubernetes cluster.

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Roosevelt

11 months ago

ClusterIP services are only accessible within the cluster, right?

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Alfreda

11 months ago

Yes, NodePort services expose the service externally through each node's IP address.

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Penney

11 months ago

I agree, D is definitely correct. NodePort services are useful for external access.

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Florencia

12 months ago

I'm pretty sure A is also correct. ClusterIP services are only accessible within the cluster, which is perfect for internal-facing components.

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Wilda

11 months ago

B) A daemonSet ensures that a replica of a pod is running on all nodes.

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Wilda

11 months ago

A) A ClusterIP type service can only be accessed within a Kubernetes cluster.

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Desmond

12 months ago

Wait, isn't C a trick question? I'm pretty sure DeploymentConfig is an OpenShift thing, not a vanilla Kubernetes resource.

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Carmen

12 months ago

I'm not sure about statement D. Can someone explain why NodePort service does not use a cloud provider load balancer?

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Lura

12 months ago

B is definitely correct. DaemonSets ensure that a pod is running on every node in the cluster. That's super useful for things like monitoring agents and network plugins.

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