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NEW QUESTION # 38
You have built a Kubernetes environment offering virtual machine hosting using KubeVirt.
Which type of service have you created in this scenario?
Answer: A
Explanation:
Kubernetes combined with KubeVirt enables the hosting of virtual machines (VMs) alongside containerized workloads. This setup aligns with a specific cloud service model. Let's analyze each option:
A . Software as a Service (SaaS)
Incorrect: SaaS delivers fully functional applications over the internet, such as Salesforce or Google Workspace. Hosting VMs using Kubernetes and KubeVirt does not fall under this category.
B . Platform as a Service (PaaS)
Incorrect: PaaS provides a platform for developers to build, deploy, and manage applications without worrying about the underlying infrastructure. While Kubernetes itself can be considered a PaaS component, hosting VMs goes beyond this model.
C . Infrastructure as a Service (IaaS)
Correct: IaaS provides virtualized computing resources such as servers, storage, and networking over the internet. By hosting VMs using Kubernetes and KubeVirt, you are offering infrastructure-level services, which aligns with the IaaS model.
D . Bare Metal as a Service (BMaaS)
Incorrect: BMaaS provides direct access to physical servers without virtualization. Kubernetes and KubeVirt focus on virtualized environments, making this option incorrect.
Why IaaS?
Virtualized Resources: Hosting VMs using Kubernetes and KubeVirt provides virtualized infrastructure, which is the hallmark of IaaS.
Scalability and Flexibility: Users can provision and manage VMs on-demand, similar to traditional IaaS offerings like AWS EC2 or OpenStack.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes understanding cloud service models, including IaaS. Recognizing how Kubernetes and KubeVirt fit into the IaaS paradigm is essential for designing hybrid cloud solutions.
For example, Juniper Contrail integrates with Kubernetes and KubeVirt to provide advanced networking and security features for IaaS-like environments.
Reference:
KubeVirt Documentation
Juniper JNCIA-Cloud Study Guide: Cloud Service Models
NEW QUESTION # 39
Which operating system must be used for control plane machines in Red Hat OpenShift?
Answer: C
Explanation:
Red Hat OpenShift requires specific operating systems for its control plane machines to ensure stability, security, and compatibility. Let's analyze each option:
A . Ubuntu
Incorrect:
While Ubuntu is a popular Linux distribution, it is not the recommended operating system for OpenShift control plane machines. OpenShift relies on Red Hat-specific operating systems for its infrastructure.
B . Red Hat Enterprise Linux
Incorrect:
Red Hat Enterprise Linux (RHEL) is commonly used for worker nodes in OpenShift clusters. However, control plane machines require a more specialized operating system optimized for Kubernetes workloads.
C . Red Hat CoreOS
Correct:
Red Hat CoreOS is the default operating system for OpenShift control plane machines. It is a lightweight, immutable operating system specifically designed for running containerized workloads in Kubernetes environments. CoreOS ensures consistency, security, and automatic updates.
D . CentOS
Incorrect:
CentOS is a community-supported Linux distribution based on RHEL. While it can be used in some Kubernetes environments, it is not supported for OpenShift control plane machines.
Why Red Hat CoreOS?
Immutable Infrastructure: CoreOS is designed to be immutable, meaning updates are applied automatically and consistently across the cluster.
Optimized for Kubernetes: CoreOS is tailored for Kubernetes workloads, providing a secure and reliable foundation for OpenShift control plane components.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers OpenShift architecture, including the operating systems used for control plane and worker nodes. Understanding the role of Red Hat CoreOS is essential for deploying and managing OpenShift clusters effectively.
For example, Juniper Contrail integrates with OpenShift to provide advanced networking features, relying on CoreOS for secure and efficient operation of control plane components.
Reference:
OpenShift Documentation: Red Hat CoreOS
Juniper JNCIA-Cloud Study Guide: OpenShift Architecture
NEW QUESTION # 40
What is the networking service of OpenStack?
Answer: C
Explanation:
OpenStack's networking service is known as Neutron. Neutron provides a scalable, API-driven, web services-based model for network connectivity as a service. It is designed to manage and configure networking services for both simple and complex network topologies. Neutron allows users to create their own networks, control traffic and connect servers and devices to one or multiple networks.
NEW QUESTION # 41
You are asked to run a container in a Kubernetes environment.
What should you do to accomplish this task?
Answer: B
Explanation:
Kubernetes uses declarative configuration files to define and manage resources like containers, pods, and services. Let's analyze each option:
A . Create a JINJA2 template for the container and its resources.
Incorrect: JINJA2 is a templating language often used in automation tools like Ansible. While it can generate Kubernetes manifests, Kubernetes itself does not use JINJA2 templates natively.
B . Create a WYSYG definition for the container and its resources.
Incorrect: "WYSYG" (What You See Is What You Get) is not a recognized format for Kubernetes configurations. Kubernetes relies on structured formats like YAML or JSON.
C . Define a YAML manifest for the container and its resources.
Correct: Kubernetes uses YAML (or JSON) manifests to define the desired state of resources, including containers, pods, and services. A YAML manifest specifies details like container images, resource limits, environment variables, and networking.
D . Define an XML configuration for the container and its resources.
Incorrect: Kubernetes does not use XML for defining resources. YAML is the standard format due to its readability and simplicity.
Why YAML Manifests?
Declarative Configuration: YAML manifests allow you to describe the desired state of your resources in a human-readable format.
Standard Practice: Kubernetes natively supports YAML for defining and deploying resources, making it the correct choice for this task.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes Kubernetes resource management, including YAML manifests. Understanding how to define and apply manifests is essential for deploying and managing containerized applications.
For example, Juniper Contrail integrates with Kubernetes to provide advanced networking features, relying on YAML manifests to configure resources.
Reference:
Kubernetes Documentation: YAML Manifests
Juniper JNCIA-Cloud Study Guide: Kubernetes Resource Management
NEW QUESTION # 42
Click the Exhibit button.
You have issued the openstack server show VM-A command and received the output shown in the exhibit.
To which virtual network is the VM-A instance attached?
Answer: C
Explanation:
The openstack server show command provides detailed information about a specific virtual machine (VM) instance in OpenStack. The output includes details such as the instance name, network attachments, power state, and more. Let's analyze the question and options:
Key Information from the Exhibit:
The addresses field in the output shows
public1=10.0.2.176
This indicates that the VM-A instance is attached to the virtual network named public1 , with an assigned IP address of 10.0.2.176 .
Option Analysis:
A . m1.tiny
Incorrect: m1.tiny refers to the flavor of the VM, which specifies the resource allocation (e.g., CPU, memory, disk). It is unrelated to the virtual network.
B . public1
Correct: The addresses field explicitly states that the VM-A instance is attached to the public1 virtual network.
C . Nova
Incorrect: Nova is the OpenStack compute service that manages VM instances. It is not a virtual network.
D . kollaopenstack
Incorrect: kollaopenstack appears in the output as the hostname or project name but does not represent a virtual network.
Why public1?
Network Attachment: The addresses field in the output directly identifies the virtual network (public1) to which the VM-A instance is attached.
IP Address Assignment: The IP address (10.0.2.176) confirms that the VM is connected to the public1 network.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes understanding OpenStack commands and outputs, including the openstack server show command. Recognizing how virtual networks are represented in OpenStack is essential for managing VM connectivity.
For example, Juniper Contrail integrates with OpenStack Neutron to provide advanced networking features for virtual networks like public1.
Reference:
OpenStack CLI Documentation: openstack server show Command
Juniper JNCIA-Cloud Study Guide: OpenStack Networking
NEW QUESTION # 43
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