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Juniper Cloud, Associate (JNCIA-Cloud) Sample Questions (Q43-Q48):

NEW QUESTION # 43
Which component of Kubernetes runs on each node maintaining network rules?

A. container runtime
B. kube-proxy
C. kubelet
D. kube controller

Answer: B

Explanation:
Kubernetes components work together to ensure seamless communication and network functionality within the cluster. Let's analyze each option:
A . container runtime
Incorrect: The container runtime (e.g., containerd, cri-o) is responsible for running containers on worker nodes. It does not maintain network rules.
B . kube-proxy
Correct: kube-proxy is a Kubernetes component that runs on each node and maintains network rules to enable communication between services and pods. It ensures proper load balancing and routing of traffic.
C . kubelet
Incorrect: The kubelet is responsible for managing the state of pods and containers on a node. It does not handle network rules.
D . kube controller
Incorrect: The kube controller manages the desired state of the cluster, such as maintaining the correct number of replicas. It does not directly manage network rules.
Why kube-proxy?
Network Rules: kube-proxy implements iptables or IPVS rules to route traffic between services and pods, ensuring seamless communication.
Load Balancing: It provides basic load balancing for services, distributing traffic across available pods.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Kubernetes networking, including the role of kube-proxy. Understanding how kube-proxy works is essential for managing network communication in Kubernetes clusters.
For example, Juniper Contrail integrates with Kubernetes to enhance networking capabilities, leveraging kube-proxy for service-level traffic management.
Reference:
Kubernetes Documentation: kube-proxy
Juniper JNCIA-Cloud Study Guide: Kubernetes Networking

NEW QUESTION # 44
What is the name of the Docker container runtime?

A. containerd
B. docker cl
C. dockerd
D. cri-o

Answer: A

Explanation:
The name of the Docker container runtime is containerd, which is a daemon that manages the complete container lifecycle of its host system, from image transfer and storage to container execution and supervision to low-level storage to network attachments and beyond. Dockerd is the Docker daemon that acts as the primary user interface for Docker. Docker cl is not a valid name for any Docker component. Cri-o is another container runtime that implements the Kubernetes Container Runtime Interface (CRI) to enable using OCI (Open Container Initiative) compatible runtimes.

NEW QUESTION # 45
What are two characteristics of the OpenShift Assisted Installer? (Choose two.)

A. It provides full feature support and customizations.
B. It uses one of the control plane nodes as a bootstrap node.
C. It offers REST APIs for the configuration and installation
D. It does not support bare-metal deployments.

Answer: B,C

Explanation:
The OpenShift Assisted Installer uses one of the control plane nodes as a bootstrap node. It also offers REST APIs for the configuration and installation.

NEW QUESTION # 46
Your organization has legacy virtual machine workloads that need to be managed within a Kubernetes deployment.
Which Kubernetes add-on would be used to satisfy this requirement?

A. Romana
B. KubeVirt
C. ADOT
D. Canal

Answer: B

Explanation:
KubeVirt is a Kubernetes add-on that allows you to run and manage legacy virtual machine workloads alongside container workloads within a Kubernetes deployment. According to the KubeVirt website, KubeVirt is "a virtual machine management add-on for Kubernetes" that "aims to provide a common ground for virtualization solutions on top of Kubernetes". Other Kubernetes add- ons that are mentioned in the question are Canal, which is a network policy provider that combines Flannel and Calico; ADOT, which is a distribution of the OpenTelemetry Collector that supports tracing and metrics collection for AWS services; and Romana, which is a network and security automation solution that supports multiple network topologies and policies.

NEW QUESTION # 47
You just uploaded a qcow2 image of a vSRX virtual machine in OpenStack.
In this scenario, which service stores the virtual machine (VM) image?

A. Glance
B. Ironic
C. Neutron
D. Nova

Answer: A

Explanation:
OpenStack provides various services to manage cloud infrastructure resources, including virtual machine (VM) images. Let's analyze each option:
A . Glance
Correct: Glance is the OpenStack service responsible for managing and storing VM images. It provides a repository for uploading, discovering, and retrieving images in various formats, such as qcow2, raw, or ISO.
B . Ironic
Incorrect: Ironic is the OpenStack bare-metal provisioning service. It is used to manage physical servers, not VM images.
C . Neutron
Incorrect: Neutron is the OpenStack networking service that manages virtual networks, routers, and IP addresses. It does not store VM images.
D . Nova
Incorrect: Nova is the OpenStack compute service that manages the lifecycle of virtual machines. While Nova interacts with Glance to retrieve VM images for deployment, it does not store the images itself.
Why Glance?
Image Repository: Glance acts as the central repository for VM images, enabling users to upload, share, and deploy images across the OpenStack environment.
Integration with Nova: When deploying a VM, Nova retrieves the required image from Glance to create the instance.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers OpenStack services, including Glance, as part of its cloud infrastructure curriculum. Understanding Glance's role in image management is essential for deploying and managing virtual machines in OpenStack.
For example, Juniper Contrail integrates with OpenStack Glance to provide advanced networking features for VM images stored in the repository.
Reference:
OpenStack Glance Documentation
Juniper JNCIA-Cloud Study Guide: OpenStack Services

NEW QUESTION # 48
......

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