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Juniper JN0-214 Exam Syllabus Topics:

Topic	Details
Topic 1	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.
Topic 2	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.
Topic 3	Software-Defined Networking: This section of the exam measures the skills of Network Automation Engineers and focuses on SDN concepts, including its architecture, controllers, and solutions. Candidates must understand how SDN separates the control plane from the data plane to improve network agility and automation. The exam also evaluates knowledge of SDN’s role in modern cloud environments. One key skill assessed is identifying SDN components and their functions.
Topic 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.
Topic 5	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.

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Juniper Cloud, Associate (JNCIA-Cloud) Sample Questions (Q29-Q34):

NEW QUESTION # 29
You want to limit the memory, CPU, and network utilization of a set of processes running on a Linux host.
Which Linux feature would you configure in this scenario?
You want to limit the memory, CPU, and network utilization of a set of processes running on a Linux host.
Which Linux feature would you configure in this scenario?

A. control groups
B. network namespaces
C. slicing
D. virtual routing and forwarding instances

Answer: A

Explanation:
Linux provides several features to manage system resources and isolate processes. Let's analyze each option:
A . virtual routing and forwarding instances
Incorrect: Virtual Routing and Forwarding (VRF) is a networking feature used to create multiple routing tables on a single router or host. It is unrelated to limiting memory, CPU, or network utilization for processes.
B . network namespaces
Incorrect: Network namespaces are used to isolate network resources (e.g., interfaces, routing tables) for processes. While they can help with network isolation, they do not directly limit memory or CPU usage.
C . control groups
Correct: Control Groups (cgroups) are a Linux kernel feature that allows you to limit, account for, and isolate the resource usage (CPU, memory, disk I/O, network) of a set of processes. cgroups are commonly used in containerization technologies like Docker and Kubernetes to enforce resource limits.
D . slicing
Incorrect: "Slicing" is not a recognized Linux feature for resource management. This term may refer to dividing resources in other contexts but is not relevant here.
Why Control Groups?
Resource Management: cgroups provide fine-grained control over memory, CPU, and network utilization, ensuring that processes do not exceed their allocated resources.
Containerization Foundation: cgroups are a core technology behind container runtimes like containerd and orchestration platforms like Kubernetes.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Linux features like cgroups as part of its containerization curriculum. Understanding cgroups is essential for managing resource allocation in cloud environments.
For example, Juniper Contrail integrates with Kubernetes to manage containerized workloads, leveraging cgroups to enforce resource limits.
Reference:
Linux Kernel Documentation: Control Groups
Juniper JNCIA-Cloud Study Guide: Linux Features

NEW QUESTION # 30
Which virtualization method requires less duplication of hardware resources?

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

Answer: A

Explanation:
OS-level virtualization requires less duplication of hardware resources. This method allows multiple instances of an operating system or multiple different operating systems to run on a single physical server, sharing the same hardware resources. This results in more efficient use of hardware resources compared to other virtualization methods such as full virtualization or paravirtualization.

NEW QUESTION # 31
Which SDN model provisions tunnels between the virtual endpoints within and across data centers?

A. SDN overlay
B. SDN by APIs
C. open SDN
D. switch-based SDN

Answer: A

Explanation:
The SDN overlay model provisions tunnels between the virtual endpoints within and across data centers. This model uses network overlays to support private communication between instances.

NEW QUESTION # 32
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

Answer: C

Explanation:
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

NEW QUESTION # 33
What are the two primary ways used to manage objects by kubectl? (Choose two.)

A. declarative object configuration
B. imperative object commands
C. imperative commands
D. declarative commands

Answer: A,C

Explanation:
The two primary ways used to manage objects by kubectl are imperative commands and declarative object configuration. Imperative commands operate directly on live objects in a cluster. The user provides operations to the kubectl command as arguments or flags. Declarative object configuration specifies the operation (create, replace, etc.), optional flags and at least one file name. The file specified must contain a full definition of the object in YAML or JSON format.

NEW QUESTION # 34
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