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Juniper Cloud, Associate (JNCIA-Cloud) Sample Questions (Q60-Q65):
NEW QUESTION # 60
Which two functions does CN2 provide? (Choose two.)
Answer: A,D
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 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.
NEW QUESTION # 61
Which key value store is used as a Kubernetes's backend store?
Answer: D
Explanation:
Kubernetes relies on a distributed key-value store to maintain its state and configuration data. Let's analyze each option:
A . etcd
Correct: etcd is a distributed key-value store used as Kubernetes' backend store. It stores all cluster data, including configurations, states, and metadata, ensuring consistency and reliability across the cluster.
B . firebase
Incorrect: Firebase is a Backend-as-a-Service (BaaS) platform for building mobile and web applications. It is unrelated to Kubernetes.
C . postgres
Incorrect: PostgreSQL is a relational database management system. While it can be used for other purposes, it is not the backend store for Kubernetes.
D . mongodb
Incorrect: MongoDB is a NoSQL database used for storing unstructured data. It is not used as Kubernetes' backend store.
Why etcd?
High Availability: etcd is designed for distributed systems, providing strong consistency and fault tolerance.
Cluster State Management: Kubernetes uses etcd to store critical data such as pod states, service definitions, and configuration details.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers Kubernetes architecture, including the role of etcd. Understanding etcd's function is essential for managing and troubleshooting Kubernetes clusters.
For example, Juniper Contrail integrates with Kubernetes to provide networking and security features, relying on etcd for cluster state management.
Reference:
Kubernetes Documentation: etcd
Juniper JNCIA-Cloud Study Guide: Kubernetes Architecture
NEW QUESTION # 62
Which command would you use to see which VMs are running on your KVM device?
Answer: A
Explanation:
KVM (Kernel-based Virtual Machine) is a popular open-source virtualization technology that allows you to run virtual machines (VMs) on Linux systems. The virsh command-line tool is used to manage KVM VMs. Let's analyze each option:
A . virt-install
Incorrect: The virt-install command is used to create and provision new virtual machines. It is not used to list running VMs.
B . virsh net-list
Incorrect: The virsh net-list command lists virtual networks configured in the KVM environment. It does not display information about running VMs.
C . virsh list
Correct: The virsh list command displays the status of virtual machines managed by the KVM hypervisor. By default, it shows only running VMs. You can use the --all flag to include stopped VMs in the output.
D . VBoxManage list runningvms
Incorrect: The VBoxManage command is used with Oracle VirtualBox, not KVM. It is unrelated to KVM virtualization.
Why virsh list?
Purpose-Built for KVM: virsh is the standard tool for managing KVM virtual machines, and virsh list is specifically designed to show the status of running VMs.
Simplicity: The command is straightforward and provides the required information without additional complexity.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes understanding virtualization technologies, including KVM. Managing virtual machines using tools like virsh is a fundamental skill for operating virtualized environments.
For example, Juniper Contrail supports integration with KVM hypervisors, enabling the deployment and management of virtualized network functions (VNFs). Proficiency with KVM tools ensures efficient management of virtualized infrastructure.
Reference:
KVM Documentation: virsh Command
Juniper JNCIA-Cloud Study Guide: Virtualization
NEW QUESTION # 63
The openstack user list command uses which OpenStack service?
Answer: A
Explanation:
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
NEW QUESTION # 64
Which term identifies to which network a virtual machine interface is connected?
Answer: B
Explanation:
In cloud environments, virtual machines (VMs) connect to virtual networks to enable communication. Identifying the network to which a VM interface is connected is essential for proper configuration and isolation. Let's analyze each option:
A . virtual network ID
Correct: The virtual network ID uniquely identifies the virtual network to which a VM interface is connected. This ID is used to logically group VMs and ensure they can communicate within the same network while maintaining isolation from other networks.
B . machine access control (MAC)
Incorrect: The MAC address is a hardware identifier for a network interface card (NIC). While it is unique to each interface, it does not identify the network to which the VM is connected.
C . Virtual Extensible LAN (VXLAN)
Incorrect: VXLAN is a tunneling protocol used to create overlay networks in cloud environments. While VXLAN encapsulates traffic, it does not directly identify the network to which a VM interface is connected.
D . virtual tunnel endpoint (VTEP)
Incorrect: A VTEP is a component of overlay networks (e.g., VXLAN) that encapsulates and decapsulates traffic. It is used to establish tunnels but does not identify the virtual network itself.
Why Virtual Network ID?
Logical Isolation: The virtual network ID ensures that VMs are logically grouped into isolated networks, enabling secure and efficient communication.
Scalability: Virtual networks allow cloud environments to scale by supporting multiple isolated networks within the same infrastructure.
JNCIA Cloud Reference:
The JNCIA-Cloud certification emphasizes understanding virtual networking concepts, including virtual networks and their identifiers. Virtual network IDs are fundamental to cloud architectures, enabling multi-tenancy and network segmentation.
For example, Juniper Contrail uses virtual network IDs to manage connectivity and isolation for VMs in cloud environments. Proper configuration of virtual networks ensures seamless communication and security.
Reference:
Virtual Networking Documentation
Juniper JNCIA-Cloud Study Guide: Virtual Networks
NEW QUESTION # 65
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