QUESTION: 5

Which two statements describe a multitenant cloud? (Choose two.)

Tenants are aware of other tenants using their shared resources.
Servers, network, and storage are separated per tenant.
The entities of each tenant are isolated from one another.
Multiple customers of a cloud vendor have access to their own dedicated hardware.

Answer(s): C,D

Explanation:

A multitenant cloud is a cloud architecture where multiple customers (tenants) share the same physical infrastructure or platform while maintaining logical isolation. Let's analyze each statement:

A . Tenants are aware of other tenants using their shared resources.

Incorrect: In a multitenant cloud, tenants are logically isolated from one another.
While they may share underlying physical resources (e.g., servers, storage), they are unaware of other tenants and cannot access their data or applications. This isolation ensures security and privacy.

B . Servers, network, and storage are separated per tenant.

Incorrect: In a multitenant cloud, resources such as servers, network, and storage are shared among tenants. The separation is logical, not physical. For example, virtualization technologies like hypervisors and software-defined networking (SDN) are used to create isolated environments for each tenant.

C . The entities of each tenant are isolated from one another.

Correct: Logical isolation is a fundamental characteristic of multitenancy. Each tenant's data, applications, and configurations are isolated to prevent unauthorized access or interference. Technologies like virtual private clouds (VPCs) and network segmentation ensure this isolation.

D . Multiple customers of a cloud vendor have access to their own dedicated hardware.

Correct: While multitenancy typically involves shared resources, some cloud vendors offer dedicated hardware options for customers with strict compliance or performance requirements. For example,

AWS offers "Dedicated Instances" or "Dedicated Hosts," which provide dedicated physical servers for specific tenants within a multitenant environment.

Reference:

The Juniper Networks Certified Associate - Cloud (JNCIA-Cloud) curriculum discusses multitenancy as a key feature of cloud computing. Multitenancy enables efficient resource utilization and cost savings by allowing multiple tenants to share infrastructure while maintaining isolation.

For example, Juniper Contrail supports multitenancy by providing features like VPCs, network overlays, and tenant isolation. These capabilities ensure that each tenant has a secure and independent environment within a shared infrastructure.

NIST Cloud Computing Reference Architecture

Juniper JNCIA-Cloud Study Guide: Multitenancy

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QUESTION: 6

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

A It implements virtualized tunnel endpoints

It decouples the network software from the hardware.
It implements virtualized network functions
It decouples the network control plane from the forwarding plane.

Answer(s): B,C

Explanation:

Network Functions Virtualization (NFV) is a framework designed to virtualize network services traditionally run on proprietary hardware. NFV aims to reduce costs, improve scalability, and increase flexibility by decoupling network functions from dedicated hardware appliances. Let's analyze each statement:

A . It implements virtualized tunnel endpoints.

Incorrect: While NFV can support virtualized tunnel endpoints (e.g., VXLAN gateways), this is not a defining characteristic of the NFV framework. Tunneling protocols are typically associated with SDN or overlay networks rather than NFV itself.

B . It decouples the network software from the hardware.

Correct: One of the primary goals of NFV is to separate network functions (e.g., firewalls, load balancers, routers) from proprietary hardware. Instead, these functions are implemented as software running on standard servers or virtual machines.

C . It implements virtualized network functions.

Correct: NFV replaces traditional hardware-based network appliances with virtualized network functions (VNFs). Examples include virtual firewalls, virtual routers, and virtual load balancers. These VNFs run on commodity hardware and are managed through orchestration platforms.

D . It decouples the network control plane from the forwarding plane.

Incorrect: Decoupling the control plane from the forwarding plane is a characteristic of Software- Defined Networking (SDN), not NFV.
While NFV and SDN are complementary technologies, they serve different purposes. NFV focuses on virtualizing network functions, while SDN focuses on programmable network control.

Reference:

The JNCIA-Cloud certification covers NFV as part of its discussion on cloud architectures and virtualization. NFV is particularly relevant in modern cloud environments because it enables flexible and scalable deployment of network services without reliance on specialized hardware.

For example, Juniper Contrail integrates with NFV frameworks to deploy and manage VNFs, enabling service providers to deliver network services efficiently and cost-effectively.

ETSI NFV Framework Documentation

Juniper JNCIA-Cloud Study Guide: Network Functions Virtualization

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QUESTION: 7

What is the name of the Docker container runtime?

docker_cli
containerd
dockerd
cri-o

Answer(s): B

Explanation:

Docker is a popular containerization platform that relies on a container runtime to manage the lifecycle of containers. The container runtime is responsible for tasks such as creating, starting, stopping, and managing containers. Let's analyze each option:

A . docker_cli

Incorrect: The Docker CLI (Command Line Interface) is a tool used to interact with the Docker daemon (dockerd). It is not a container runtime but rather a user interface for managing Docker containers.

B . containerd

Correct: containerd is the default container runtime used by Docker. It is a lightweight, industry- standard runtime that handles low-level container management tasks, such as image transfer, container execution, and lifecycle management. Docker delegates these tasks to containerd through the Docker daemon.

C . dockerd

Incorrect: dockerd is the Docker daemon, which manages Docker objects such as images, containers, networks, and volumes.
While dockerd interacts with the container runtime, it is not the runtime itself.

D . cri-o

Incorrect: cri-o is an alternative container runtime designed specifically for Kubernetes. It implements the Kubernetes Container Runtime Interface (CRI) and is not used by Docker.

Why containerd?

Industry Standard: containerd is a widely adopted container runtime that adheres to the Open Container Initiative (OCI) standards.

Integration with Docker: Docker uses containerd as its default runtime, making it the correct answer in this context.

Reference:

The JNCIA-Cloud certification emphasizes understanding containerization technologies and their components. Docker and its runtime (containerd) are foundational tools in modern cloud environments, enabling lightweight, portable, and scalable application deployment.

For example, Juniper Contrail integrates with container orchestration platforms like Kubernetes, which often use containerd as the underlying runtime. Understanding container runtimes is essential for managing containerized workloads in cloud environments.

Docker Documentation: Container Runtimes

Open Container Initiative (OCI) Standards

Juniper JNCIA-Cloud Study Guide: Containerization

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QUESTION: 8

Which command should you use to obtain low-level information about Docker objects?

docker info <OBJECT_NAME>
docker inspect <OBJECT_NAME>
docker container <OBJECT_NAME>
docker system <OBJECT_NAME>

Answer(s): B

Explanation:

Docker provides various commands to manage and interact with Docker objects such as containers, images, networks, and volumes. To obtain low-level information about these objects, the docker inspect command is used. Let's analyze each option:

A . docker info <OBJECT_NAME>

Incorrect: The docker info command provides high-level information about the Docker daemon itself, such as the number of containers, images, and system-wide configurations. It does not provide detailed information about specific Docker objects.

B . docker inspect <OBJECT_NAME>

Correct: The docker inspect command retrieves low-level metadata and configuration details about Docker objects (e.g., containers, images, networks, volumes). This includes information such as IP addresses, mount points, environment variables, and network settings. It outputs the data in JSON format for easy parsing and analysis.

C . docker container <OBJECT_NAME>

Incorrect: The docker container command is a parent command for managing containers (e.g., docker container ls, docker container start). It does not directly provide low-level information about a specific container.

D . docker system <OBJECT_NAME>

Incorrect: The docker system command is used for system-wide operations, such as pruning unused resources (docker system prune) or viewing disk usage (docker system df). It does not provide low- level details about specific Docker objects.

Why docker inspect?

Detailed Metadata: docker inspect is specifically designed to retrieve comprehensive, low-level information about Docker objects.

Versatility: It works with multiple object types, including containers, images, networks, and volumes.

Reference:

The JNCIA-Cloud certification covers Docker as part of its containerization curriculum. Understanding how to use Docker commands like docker inspect is essential for managing and troubleshooting containerized applications in cloud environments.

For example, Juniper Contrail integrates with container orchestration platforms like Kubernetes, which rely on Docker for container management. Proficiency with Docker commands ensures effective operation and debugging of containerized workloads.

Docker Documentation: docker inspect Command

Juniper JNCIA-Cloud Study Guide: Containerization

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Free JN0-214 Exam Braindumps (page: 3)

QUESTION: 5

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QUESTION: 6

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QUESTION: 7

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QUESTION: 8

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