JN0-214問題集PDFは最新 [2025年最新] 究極な学習ガイド [Q35-Q54]

JN0-214問題集PDFは最新 [2025年最新] 究極な学習ガイド

JN0-214試験問題集PDFは更新された問題集でしかも合格保証付き

Juniper JN0-214 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Cloud Fundamentals: This section of the exam measures the skills of Cloud Infrastructure Engineers and covers the fundamental concepts of cloud networking. Candidates must understand different deployment models such as public, private, and hybrid cloud, as well as service models such as SaaS, IaaS, and PaaS. The exam also tests knowledge of cloud-native architectures, automation tools, and infrastructure technologies, including Network Functions Virtualization (NFV) and Software-Defined Networking (SDN). One key skill assessed is identifying appropriate cloud deployment models for different business needs.
トピック 2	Cloud Orchestration with OpenShift: This section of the exam measures the skills of DevOps Engineers and focuses on OpenShift-based orchestration. Candidates must understand how to create, manage, and monitor workloads using OpenShift, as well as navigate the OpenShift CLI and WebUI. The exam also tests knowledge of node types and different network configurations. One skill assessed is managing OpenShift workloads in a production environment.
トピック 3	Network Functions Virtualization: This section of the exam measures the skills of Virtualization Specialists and covers the core principles of NFV. Candidates will be tested on NFV architecture, orchestration, and Virtual Network Functions (VNFs), which are crucial for creating scalable and flexible network infrastructures. Understanding NFV helps optimize network performance and reduce dependency on hardware-based solutions. One skill assessed is the ability to explain NFV’s role in modern network management.
トピック 4	Network Virtualization: This section of the exam measures the skills of Cloud Network Architects and evaluates the principles of network virtualization. Candidates must understand different types of virtual networks, as well as underlay and overlay network configurations. The exam also covers encapsulation and tunneling technologies such as MPLS over GRE, VXLAN, and GENEVE. One skill assessed is the ability to differentiate between underlay and overlay networks in cloud environments.
トピック 5	Linux Containers: This section of the exam measures the skills of Containerization Specialists and covers the concepts of Linux containers. Candidates must understand the differences between virtual machines and containers, as well as container components. The exam tests the ability to create and manage containers using Docker. One key skill assessed is deploying and managing containers efficiently.
トピック 6	Cloud Orchestration with Kubernetes: This section of the exam measures the skills of Kubernetes Administrators and tests their knowledge of container orchestration. Candidates must demonstrate proficiency in creating and managing Kubernetes containers, working with API objects such as Pods, ReplicaSets, Deployments, and Services, and configuring namespaces and CNI plugins. One key skill assessed is deploying and scaling Kubernetes applications effectively.

質問 # 35
Click the Exhibit button.

Referring to the exhibit, which two statements are correct? (Choose two.)

A. The myvSRX instance is part of a default network.
B. The c using a custom flavor.
C. The myvSRX instance is using a default image.
D. The myvSRX instance is currently running.

正解：B、D

解説：
Based on the image description provided, the instance named 'myvSRX' appears to be using a custom flavor (not default) and is currently in an 'ACTIVE' state, which means it is running.

質問 # 36
Which two statements are true about virtual networks? (Choose two.)

A. Virtual networks are available only as part of a cloud orchestration system.
B. Virtual networks are available on common Linux distributions.
C. Virtual networks are able to span multiple devices.
D. Virtual networks are limited to a single device.

正解：B、C

解説：
Virtual networks are logical networks that are decoupled from the underlying network hardware.
This decoupling allows network administrators to manage their networks independently of the physical network topology. As such, virtual networks can span multiple devices, allowing for a high degree of flexibility and scalability. Furthermore, virtual networks are available on common Linux distributions, allowing for easy deployment and management.

質問 # 37
Which OpenShift resource represents a Kubernetes namespace?

A. Operator
B. Build
C. Project
D. ResourceQuota

正解：C

解説：
OpenShift is a Kubernetes-based container platform that introduces additional abstractions and terminologies. Let's analyze each option:
A . Project
Correct:
In OpenShift, a Project represents a Kubernetes namespace with additional capabilities. It provides a logical grouping of resources and enables multi-tenancy by isolating resources between projects.
B . ResourceQuota
Incorrect:
A ResourceQuota is a Kubernetes object that limits the amount of resources (e.g., CPU, memory) that can be consumed within a namespace. While it is used within a project, it is not the same as a namespace.
C . Build
Incorrect:
A Build is an OpenShift-specific resource used to transform source code into container images. It is unrelated to namespaces or projects.
D . Operator
Incorrect:
An Operator is a Kubernetes extension that automates the management of complex applications. It operates within a namespace but does not represent a namespace itself.
Why Project?
Namespace Abstraction: OpenShift Projects extend Kubernetes namespaces by adding features like user roles, quotas, and lifecycle management.
Multi-Tenancy: Projects enable organizations to isolate workloads and resources for different teams or applications.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers OpenShift and its integration with Kubernetes. Understanding the relationship between Projects and namespaces is essential for managing OpenShift environments.
For example, Juniper Contrail integrates with OpenShift to provide advanced networking and security features for Projects, ensuring secure and efficient resource isolation.
Reference:
OpenShift Documentation: Projects
Juniper JNCIA-Cloud Study Guide: OpenShift and Kubernetes

質問 # 38
What is the networking service of OpenStack?

A. Barbican
B. Heat
C. Neutron
D. ironic

正解：C

解説：
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.

質問 # 39
Your e-commerce application is deployed on a public cloud. As compared to the rest of the year, it receives substantial traffic during the Christmas season.
In this scenario, which cloud computing feature automatically increases or decreases the resource based on the demand?

A. resource pooling
B. on-demand self-service
C. broad network access
D. rapid elasticity

正解：D

解説：
Cloud computing provides several key characteristics that enable flexible and scalable resource management. Let's analyze each option:
A . resource pooling
Incorrect: Resource pooling refers to the sharing of computing resources (e.g., storage, processing power) among multiple users or tenants. While important, it does not directly address the automatic scaling of resources based on demand.
B . on-demand self-service
Incorrect: On-demand self-service allows users to provision resources (e.g., virtual machines, storage) without requiring human intervention. While this is a fundamental feature of cloud computing, it does not describe the ability to automatically scale resources.
C . rapid elasticity
Correct: Rapid elasticity is the ability of a cloud environment to dynamically increase or decrease resources based on demand. This ensures that applications can scale up during peak traffic periods (e.g., Christmas season) and scale down during low-demand periods, optimizing cost and performance.
D . broad network access
Incorrect: Broad network access refers to the ability to access cloud services over the internet from various devices. While essential for accessibility, it does not describe the scaling of resources.
Why Rapid Elasticity?
Dynamic Scaling: Rapid elasticity ensures that resources are provisioned or de-provisioned automatically to meet changing workload demands.
Cost Efficiency: By scaling resources only when needed, organizations can optimize costs while maintaining performance.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes the key characteristics of cloud computing, including rapid elasticity. Understanding this concept is essential for designing scalable and cost-effective cloud architectures.
For example, Juniper Contrail supports cloud elasticity by enabling dynamic provisioning of network resources in response to changing demands.
Reference:
NIST Cloud Computing Reference Architecture
Juniper JNCIA-Cloud Study Guide: Cloud Characteristics

質問 # 40
Which two functions does CN2 provide? (Choose two.)

A. It provides underlay network management capabilities.
B. It provides enhanced networking capabilities to private clouds.
C. It performs SDN functions in an NFV solution.
D. It provides an orchestration solution for VMs and containers.

正解：B、D

解説：
CN2 (Cranial Nerve II), also known as the optic nerve, controls the special sense of vision. It transmits visual information from the retina to the vision centers of the brain. Two functions that CN2 provides are:
It provides enhanced networking capabilities to private clouds. It transmits special afferent impulses of light to the brain and is involved in several reflex arcs related to the ocular system.
It provides an orchestration solution for VMs and containers. It is a unique structure that functions as the bridge between the retinal layer of the eyes and the visual cortex of the brain.

質問 # 41
Which two statements are correct about Network Functions Virtualization (NFV)? (Choose two.)

A. The NFV framework explains how VNFs fits into the whole solution.
B. The NFV infrastructure (NFVI) is a component of NFV.
C. The NFV infrastructure (NFVI) is not a component of NFV.
D. The NFV framework is defined by the W3C.

正解：A、B

解説：
Network Functions Virtualization (NFV) is a network architecture concept that uses IT virtualization technologies to virtualize entire classes of network node functions into building blocks that may connect or chain together to create communication services. The NFV framework explains how Virtual Network Functions (VNFs) fit into the whole solution. The NFV Infrastructure (NFVI) is a component of NFV that consists of the infrastructure components --compute, storage, networking-- on a platform to support software.

質問 # 42
Which two features are provided by CN2? (Choose two.)

A. role-based access control
B. user-defined virtual networks
C. isolated namespaces
D. application firewall

正解：B、C

解説：
According to the CN2 datasheet, CN2 supports "multiple isolated namespaces for each tenant, allowing for overlapping IP addresses among tenants" and "user-defined virtual networks that can span across clusters, regions, and clouds". Other features of CN2 include cloud-native networking, NetOps-driven automation, edge and remote compute, enhanced observability, and ultra-fast, high performance.

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

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

正解：D

解説：
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

質問 # 44
The openstack user list command uses which OpenStack service?

A. Keystone
B. Neutron
C. Nova
D. Cinder

正解：A

解説：
OpenStack provides various services to manage cloud infrastructure resources, including user management. Let's analyze each option:
A . Cinder
Incorrect: Cinder is the OpenStack block storage service that provides persistent storage volumes for virtual machines. It is unrelated to managing users.
B . Keystone
Correct: Keystone is the OpenStack identity service responsible for authentication, authorization, and user management. The openstack user list command interacts with Keystone to retrieve a list of users in the OpenStack environment.
C . Nova
Incorrect: Nova is the OpenStack compute service that manages virtual machine instances. It does not handle user management.
D . Neutron
Incorrect: Neutron is the OpenStack networking service that manages virtual networks, routers, and IP addresses. It is unrelated to user management.
Why Keystone?
Identity Management: Keystone serves as the central identity provider for OpenStack, managing users, roles, and projects.
API Integration: Commands like openstack user list rely on Keystone's APIs to query and display user information.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers OpenStack services, including Keystone, as part of its cloud infrastructure curriculum. Understanding Keystone's role in user management is essential for operating OpenStack environments.
For example, Juniper Contrail integrates with OpenStack Keystone to enforce authentication and authorization for network resources.
Reference:
OpenStack Keystone Documentation
Juniper JNCIA-Cloud Study Guide: OpenStack Services

質問 # 45
Which two statements are correct about OpenStack networks? (Choose two.)

A. It is possible to share networks with other projects in an OpenStack network.
B. It is possible to enable DHCP for a subnet in an OpenStack network.
C. It is not possible to specify a subnet address in an OpenStack network.
D. It is not possible to add host routes in the DHCP settings in an OpenStack network.

正解：A、B

解説：
In OpenStack networks, it is possible to share networks with other projects. Also, it is possible to enable DHCP for a subnet in an OpenStack network.

質問 # 46
Which cloud automation tool uses YAML playbooks to install software and tools on servers?

A. Heat
B. Terraform
C. Python
D. Ansible

正解：D

解説：
According to the Ansible documentation4, Ansible playbooks are "automation blueprints, in YAML format, that Ansible uses to deploy and configure nodes in an inventory". Other cloud automation tools that are mentioned in the question are Terraform, which uses HCL (HashiCorp Configuration Language) or JSON files to provision infrastructure resources; Python, which is a general-purpose programming language that can be used for various automation tasks; and Heat, which is an orchestration service for OpenStack that uses HOT (Heat Orchestration Template) or CFN (AWS CloudFormation) formats to describe stacks of cloud resources.

質問 # 47
Which virtualization technique is used by containers?

A. full visualization
B. hardware-assisted virtualization
C. paravirtualization
D. OS-level virtualization

正解：D

解説：
This technique allows multiple isolated user-space instances to be created by the host operating system. Unlike full virtualization, where the entire system's hardware is emulated, OS-level virtualization shares the host's operating system kernel but isolates the application processes.

質問 # 48
Click the Exhibit button.

Referring to the exhibit, which port number would external users use to access the WEB application?

A. 0
B. 1
C. 2
D. 3

正解：C

解説：
The YAML file provided in the exhibit defines a Kubernetes Service object of type NodePort. Let's break down the key components of the configuration and analyze how external users access the WEB application:
Key Fields in the YAML File:
type: NodePort:
This specifies that the service is exposed on a static port on each node in the cluster. External users can access the service using the node's IP address and the assigned nodePort.
port: 8080:
This is the port on which the service is exposed internally within the Kubernetes cluster. Other services or pods within the cluster can communicate with this service using port 8080.
targetPort: 5000:
This is the port on which the actual application (WEB application) is running inside the pod. The service forwards traffic from port: 8080 to targetPort: 5000.
nodePort: 31000:
This is the port on the node (host machine) where the service is exposed externally. External users will use this port to access the WEB application.
How External Users Access the WEB Application:
External users access the WEB application using the node's IP address and the nodePort value (31000).
The Kubernetes service listens on this port and forwards incoming traffic to the appropriate pods running the WEB application.
Why Not Other Options?
A . 80: Port 80 is commonly used for HTTP traffic, but it is not specified in the YAML file. The service does not expose port 80 externally.
B . 8080: Port 8080 is the internal port used within the Kubernetes cluster. It is not the port exposed to external users.
D . 5000: Port 5000 is the target port where the application runs inside the pod. It is not directly accessible to external users.
Why 31000?
NodePort Service Type: The NodePort service type exposes the application on a high-numbered port (default range: 30000-32767) on each node in the cluster.
External Accessibility: External users must use the nodePort value (31000) along with the node's IP address to access the WEB application.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Kubernetes networking concepts, including service types like ClusterIP, NodePort, and LoadBalancer. Understanding how NodePort services work is essential for exposing applications to external users in Kubernetes environments.
For example, Juniper Contrail integrates with Kubernetes to provide advanced networking features, such as load balancing and network segmentation, for services like the one described in the exhibit.
Reference:
Kubernetes Documentation: Service Types
Juniper JNCIA-Cloud Study Guide: Kubernetes Networking

質問 # 49
Which statement is correct about a vRouter?

A. A vRouter uses logical systems to create individual routing tables for each tenant.
B. A vRouter can only provide connections to a single tenant's VM.
C. A vRouter always provides a direct connection between a tenant VM and the underlay network.
D. A vRouter uses virtual routing and forwarding (VRF) instances to create individual routing tables for each tenant.

正解：D

解説：
A vRouter uses virtual routing and forwarding (VRF) instances to create individual routing tables for each tenant. A VRF is a logical partition of a router's routing table that allows multiple instances of routing information to coexist on the same router. A vRouter can provide connections to multiple tenants' VMs by using different VRFs for each tenant.

質問 # 50
What are the two characteristics of the Network Functions Virtualization (NFV) framework?
(Choose two.)

A. It implements virtualized tunnel endpoints.
B. It decouples the network software from the hardware.
C. It implements virtualized network functions
D. It decouples the network control plane from the forwarding plane.

正解：B、C

解説：
The two characteristics of the Network Functions Virtualization (NFV) framework are that it implements virtualized network functions (VNFs) and that it decouples the network software from the hardware. According to the NFV overview by VMware, NFV is "designed to deliver the network services needed to support an infrastructure totally independent from hardware by decoupling network functions from proprietary purpose-built hardware appliances" and that "the software that provides these network services are known as virtual network functions (VNFs) and run on generic hardware". Other characteristics that are mentioned in the question are related to Software Defined Networking (SDN), not NFV. SDN separates the network control plane from the forwarding plane and implements virtualized tunnel endpoints.

質問 # 51
When considering OpenShift and Kubernetes, what are two unique resources of OpenShift? (Choose two.)

A. build
B. ingress
C. routes
D. services

正解：A、C

解説：
OpenShift extends Kubernetes by introducing additional resources and abstractions to simplify application development and deployment. Let's analyze each option:
A . routes
Correct:
Routes are unique to OpenShift and provide a way to expose services externally by mapping a hostname to a service. They are built on top of Kubernetes Ingress but offer additional features like TLS termination and wildcard support.
B . build
Correct:
Builds are unique to OpenShift and represent the process of transforming source code into container images. OpenShift provides build configurations and strategies (e.g., Docker, S2I) to automate this process, which is not natively available in Kubernetes.
C . ingress
Incorrect:
Ingress is a standard Kubernetes resource used to manage external access to services. While OpenShift uses Ingress as the foundation for its Routes, Ingress itself is not unique to OpenShift.
D . services
Incorrect:
Services are a core Kubernetes resource used to expose applications internally within the cluster. They are not unique to OpenShift.
Why These Resources?
Routes: Extend Kubernetes Ingress to provide advanced external access capabilities, such as custom domain mappings and TLS termination.
Builds: Simplify the process of building container images directly within the OpenShift platform, enabling streamlined CI/CD workflows.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers OpenShift's unique resources as part of its curriculum on container orchestration platforms. Understanding the differences between OpenShift and Kubernetes resources is essential for leveraging OpenShift's full capabilities.
For example, Juniper Contrail integrates with OpenShift to provide advanced networking features, ensuring secure and efficient traffic routing for Routes and Builds.
Reference:
OpenShift Documentation: Routes and Builds
Juniper JNCIA-Cloud Study Guide: OpenShift vs. Kubernetes

質問 # 52
Which Docker component builds, runs, and distributes Docker containers?

A. docker cli
B. container
C. dockerd
D. docker registry

正解：C

解説：
Docker is a popular containerization platform that includes several components to manage the lifecycle of containers. Let's analyze each option:
A . dockerd
Correct: The Docker daemon (dockerd) is the core component responsible for building, running, and distributing Docker containers. It manages Docker objects such as images, containers, networks, and volumes, and handles requests from the Docker CLI or API.
B . docker registry
Incorrect: A Docker registry is a repository for storing and distributing Docker images. While it plays a role in distributing containers, it does not build or run them.
C . docker cli
Incorrect: The Docker CLI (Command Line Interface) is a tool used to interact with the Docker daemon (dockerd). It is not responsible for building, running, or distributing containers but rather sends commands to the daemon.
D . container
Incorrect: A container is an instance of a running application created from a Docker image. It is not a component of Docker but rather the result of the Docker daemon's operations.
Why dockerd?
Central Role: The Docker daemon (dockerd) is the backbone of the Docker platform, managing all aspects of container lifecycle management.
Integration: It interacts with the host operating system and container runtime to execute tasks like building images, starting containers, and managing resources.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Docker as part of its containerization curriculum. Understanding the role of the Docker daemon is essential for managing containerized applications in cloud environments.
For example, Juniper Contrail integrates with Docker to provide advanced networking and security features for containerized workloads, relying on the Docker daemon to manage containers.
Reference:
Docker Documentation: Docker Daemon
Juniper JNCIA-Cloud Study Guide: Containerization

質問 # 53
Which operating system must be used for control plane machines in Red Hat OpenShift?

A. Red Hat CoreOS
B. Ubuntu
C. Red Hat Enterprise Linux
D. Centos

正解：A

解説：
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