Latest May 25, 2024 JN0-213 Brain Dump: A Study Guide with Tips & Tricks for passing Exam
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NEW QUESTION # 18
Which statement is correct about a vRouter?
- A. A vRouter always provides a direct connection between a tenant VM and the underlay network.
- B. A vRouter uses logical systems to create individual routing tables for each tenant.
- C. A vRouter can only provide connections to a single tenant's VM.
- D. A vRouter uses virtual routing and forwarding (VRF) instances to create individual routing tables for each tenant.
Answer: D
Explanation:
Explanation
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
NEW QUESTION # 19
Which two Linux commands would you use to show the amount of RAM in your system? (Choose two.)
- A. cat /proc/cpuinfo
- B. df -h
- C. cat /proc/meminto
- D. free -h
Answer: C,D
Explanation:
Explanation
he free -h command in Linux displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel89. The cat /proc/meminfo command displays real-time information about the system's memory usage as well as the buffers and shared memory used by the kernel1
NEW QUESTION # 20
Which component of a software-defined networking (SDN) controller defines where data packets are forwarded by a network device?
- A. the control plane
- B. the forwarding plane
C the management plane - C. the operational plane
Answer: B
Explanation:
Explanation
The forwarding plane (also known as the data plane) of a software-defined networking (SDN) controller is responsible for forwarding data packets based on the instructions given by the control plane23. It handles all activities involving data packets sent by the end-user, including forwarding of packets2. References from Juniper site: GeeksforGeeks, SDxCentral
NEW QUESTION # 21
Click the Exhibit button.
Referring to the exhibit, what does port: 8080 represent?
- A. It is the port on which the webapp pod is listening.
- B. It is the port that is exposed to clients that are internal to the cluster.
- C. It is the port that is used by the external load balancer.
- D. It is the port that is exposed to clients that are external to the cluster.
Answer: B
Explanation:
Explanation
In the context of a Kubernetes service, port: 8080 represents the port that is exposed to clients that are internal to the cluster45. This is the stable port the Service exposes inside the cluster - other Pods in the cluster send traffic to this port4. References from Juniper site: Nigel Poulton, Baeldung
NEW QUESTION # 22
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 resources based on the demand?
- A. rapid elasticity
- B. resource pooling
- C. broad network access
- D. on-demand self-service
Answer: A
Explanation:
Explanation
The cloud computing feature that automatically increases or decreases the resources based on the demand is known as rapid elasticity1112. In cloud computing, scaling is the process of adding or removing compute, storage, and network services to meet the demands a workload makes for resources in order to maintain availability and performance as utilization increases11.
NEW QUESTION # 23
Which two functions does CN2 provide? (Choose two.)
- A. It provides enhanced networking capabilities to private clouds.
- B. It performs SDN functions in an NFV solution.
- C. It provides underlay network management capabilities.
- D. It provides an orchestration solution for VMs and containers.
Answer: A,D
Explanation:
Explanation
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 brain78. Two functions that CN2 provides are:
It provides enhanced networking capabilities to private clouds78. It transmits special afferent impulses of light to the brain and is involved in several reflex arcs related to the ocular system7.
It provides an orchestration solution for VMs and containers78. It is a unique structure that functions as the bridge between the retinal layer of the eyes and the visual cortex of the brain7. References from Juniper site: Kenhub, Geeky Medics
NEW QUESTION # 24
Which statement is true about containers?
- A. Containers share a copy of the host's operating system binaries.
- B. Containers perform abstraction at the application layer.
- C. Containers perform abstraction at the physical layer.
- D. Containers are slower to boot than virtual machines.
Answer: B
Explanation:
Explanation
Containers perform abstraction at the application layer12. They are executable units of software in which application code is packaged along with its libraries and dependencies, in common ways so that the code can be run anywhere-whether it be on desktop, traditional IT or the cloud12.
NEW QUESTION # 25
The Kubernetes object definition file is in which format?
- A. TXT
- B. HTML
- C. YAML
- D. IXML
Answer: C
Explanation:
Explanation
The Kubernetes object definition file is in YAML format789. Kubernetes objects are represented in the Kubernetes API, and you can express them in .yaml format7. You can execute kubectl get deployment
<deployment-name> -o yaml to get the deployment definition in a yaml format8.
NEW QUESTION # 26
Which SDN model provisions tunnels between the virtual endpoints within and across data centers?
- A. SDN overlay
- B. switch-based SDN
- C. SDN by APIs
- D. open SDN
Answer: A
Explanation:
Explanation
The SDN overlay model provisions tunnels between the virtual endpoints within and across data centers2. This model uses network overlays to support private communication between instances3. References from Juniper site: Microsoft Learn, Red Hat Customer Portal
NEW QUESTION # 27
In OpenShift, which node type is used to host your application containers?
- A. worker node
- B. miner node
- C. control plane node
- D. full node
Answer: A
Explanation:
Explanation
In OpenShift, the worker node is used to host your application containers1. Worker nodes are where all your coding adventures happen, and they can be virtual or physical1. References from Juniper site: IBM Developer
NEW QUESTION # 28
Which two statements are correct about an overlay network? (Choose two.)
- A. The overlay network is built using encapsulation tunnels.
- B. The overlay network can only be built using a Layer 3 underlay network.
- C. The overlay network is the virtual network used to connect multiple virtual machines (VMs).
- D. The overlay network provides physical connectivity between devices.
Answer: A,C
Explanation:
Explanation
An overlay network is a virtual network that is built on top of another network. Nodes in the overlay network are connected by virtual or logical links, each of which corresponds to a path, perhaps through many physical links, in the underlying network45. For example, distributed systems such as peer-to-peer networks and client-server applications often overlay their own network connections over the physical network connections provided by the Internet
NEW QUESTION # 29
Which cloud automation tool uses YAML playbooks to install software and tools on servers?
- A. Terraform
- B. Ansible
- C. Python
- D. Heat
Answer: B
Explanation:
Explanation
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.
NEW QUESTION # 30
Which term identifies to which network a virtual machine interface is connected?
- A. Virtual Extensible LAN (VXLAN)
- B. machine access control (MAC)
- C. virtual tunnel endpoint (VTEP)
- D. virtual network ID (VNID)
Answer: D
Explanation:
Explanation
The term that identifies to which network a virtual machine interface is connected is the virtual network ID (VNID). The VNID is a unique identifier assigned to each virtual network. It is used to differentiate between different virtual networks and to ensure that each virtual machine interface is connected to the correct network.
NEW QUESTION # 31
Which component of Kubernetes runs on all nodes and ensures that the containers are running in a pod?
- A. kubelel
- B. kube-proxy
- C. container runtime
- D. kube controller
Answer: A
Explanation:
Explanation
The kubelet is a component of Kubernetes that runs on all nodes in the cluster and ensures that containers are running in a pod910. It takes a set of PodSpecs that are provided through various mechanisms and ensures that the containers described in those PodSpecs are running and healthy
NEW QUESTION # 32
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The c using a custom flavor.
- B. The myvSRX instance is part of a default network.
- C. The myvSRX instance is currently running.
- D. The myvSRX instance is using a default image.
Answer: A,C
Explanation:
Explanation
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.
NEW QUESTION # 33
What is the name of the Docker container runtime?
- A. docker cl
- B. cri-o
- C. containerd
- D. dockerd
Answer: C
Explanation:
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 # 34
Which two statements are correct about OpenStack networks? (Choose two.)
- A. It is not possible to specify a subnet address in an OpenStack network.
- B. It is possible to enable DHCP for a subnet in an OpenStack network.
- C. It is possible to share networks with other projects in an OpenStack network.
- D. It is not possible to add host routes in the DHCP settings in an OpenStack network.
Answer: B,C
Explanation:
Explanation
In OpenStack networks, it is possible to share networks with other projects7. Also, it is possible to enable DHCP for a subnet in an OpenStack network7. References from Juniper site: OpenStack Documentation
NEW QUESTION # 35
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