Juniper Exam JN0-214 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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Colette

3 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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3 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

2 months ago

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

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Wilda

3 months ago

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

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Desmond

3 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

3 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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3 months ago

I think statement A is correct because ClusterIP is for internal communication only.

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