ch 13 linux+

When creating and managing sandboxed apps, which of the following allows you to create packages that require no installation?

AppImage

Which of the following is a function of a virtual network switch?

Connects the VM's virtual NIC and the host's physical NIC.

Which of the following is an application that's isolated in a lightweight package and allows you to run a program from one computing environment to another?

Container

Which of the following is installed on top of the host operating system and allows containers to use resources from the host operating system as well?

Container engine

Which of the following JSON file format templates can be copied and used to create multiple containers that run the same applications?

Container image

Which of the following are Docker Hub, Amazon ECR, and Harbor all examples of?

Container registries

Which of the following provides the BEST definition of a sidecar in a Kubernetes pod?

Containers in a Kubernetes pod that perform a task on behalf of other containers Explanation Sidecars are containers in a Kubernetes pod that perform a task on behalf of other containers. You can also refer to this sidecar as an ambassador container, meaning that it's like the "spokesperson" for all your containers in the pod. However, sidecars do not manage other containers in a pod. Sidecar containers are located inside, not outside, of the pod. Sometimes, to perform a series of tasks requires multiple containers, each doing something different. When these containers are combined into pods, they're referred to as "microservices."

You have a company-developed application that is older and runs on an operating system version that is no longer supported by the company. However, the application is still a valuable tool to many company employees. Which of the following is the BEST solution to provide employees with a working copy of the application?

Create and distribute a container with the applications to employees.

Anaconda is an installation program used by Fedora, RHEL, and other distributions. Which of the following does Anaconda do? (Select three.)

Creates a file system. Provides a user interface with guided installation steps. Identifies the computer's hardware.

As the network administrator for a financial corporation, you've been asked to find a solution for running an older, company-produced application independently on various Linux distributions. You've decided to use container technology to run the company application and are looking for a container management software package that meets the following requirements: The software must be able to build and manage images. The software must run only as the root user. Which of the following software packages BEST meets these requirements?

Docker

What application allows you to create sandboxed applications with libraries that can be shared between apps? (Select the correct answer from the drop-down list.)

Flatpak

In technology, what do you call a computer application that is contained from other applications or the underlining operating system?

In technology, a sandbox is a computer application that is contained from other applications or the underlining operating system.

You were recently hired by a small start-up company. The company is in a small office and has several remote employees. You have been asked to find a business service that would accommodate the current size of the company but would also be able to scale as the company grows. The service needs to provide adequate storage as well as additional computing power. Which cloud service model would work BEST for your company?

Infrastructure as a Service (IaaS) delivers infrastructure to the client, such as processing, storage, networks, and virtualized environments. The client deploys and runs software without purchasing servers, data center space, or network equipment.

You have several virtual machines that you want disconnected from the external network and from the host computer in order to test the performance of a new system with no external distractions. Which of the following Linux bridge modes should you be using?

Isolated

Which of the following is the BEST definition of sandboxing?

Isolating programs on your computer to keep them from interacting with other programs and systems.

Which of the following are facts about the AppImage utility? (Select two.)

It does not depend on any libraries that are not part of the package. It does not need root access to the system.

Mary, a system administrator, would like to deploy virtual machines, storage, and networking in a cloud environment. Which of the following file formats would allow Mary to modularize these items as a template? (Select two).

JSON and YAML are both used by cloud providers to encapsulate virtual machines, storage, and networking into templates. This provides a way to quickly instantiate a set of cloud resources using a template.

You are looking for an orchestration engine for your network containers that allows you to do the following: Monitor the health of containers with a notification in the case that they are not running properly. Manage updates, including rolling back updates if necessary. Which of the following gives you the ability to perform these tasks?

Kubernetes

When implementing a network gateway, implementing a firewall, or increasing performance, multiple NICs can be added to a computer. Which of the following can be implemented on VMs to provide this capability?

Multi-homed NICs

Linux-based hypervisors, such as Xen, KVM, and QEMU, provide a software-based virtual network switch. Which of the following is an additional feature provided by a Linux bridge?

NAT

Which of the following Linux bridge modes is the default?

NAT

Anna, a system administrator, created a new virtual machine to provision additional hypervisors. Which of the following will provide a VM template that is open and can be used by hypervisors from different vendors?

OVF

Which of the following is the process of automating, managing, scaling, and networking containers?

Orchestration

Lynda, a network administrator, has been tasked with connecting the VMs on multiple virtual machine hosts in a way that doesn't expose the VMs to the external network. Which of the following should be implemented?

Overlay networks can be used to connect VMs on different host machines in a way that doesn't expose them to the external network.

As the network administrator for a financial corporation, you've been asked to find a solution for running an older, company-produced application independently on various Linux distributions. You've decided to use container technology to run the company application and are looking for a container management software package that meets the following requirements: The software can run rootless. The software is modular. In addition, the software only needs to be run from the command line, and creating images is not important. Which of the following software packages BEST meets these requirements?

Podman

You have decided to virtualize several of your existing Linux hardware servers. Which of the following is a MAJOR benefit you can expect from virtualization?

Pooling of multiple operating systems on the same physical hardware.

Containers and virtual machines have benefits and shortcomings. Which of the following are benefits of using a virtual machine for running applications?

Ports to other operating systems and hypervisors. Operating system and applications are added to one system.

Containers and virtual machines have benefits and shortcomings. Which of the following are the benefits of using a container for running applications?

Provides a quick startup time. Uses fewer hardware and software resources.

You have several virtual machines located in a DMZ, and want the host machine to act as a gateway. The virtual machines will be configured with IP addresses in a different subnet than the external network. Which of the following Linux bridge modes should you be using?

Routed

You run a small home business and would like to store your files, run applications, and allow customers to run applications from the cloud. You are familiar with running a variety of applications but not experienced in developing apps. Which cloud service model would work BEST for your home business?

SaaS

Which of the following are common uses of sandboxing? (Select two.)

Sandboxing can refer to environments for software development, software testing, or a place to run untrusted programs.

Which of the following are facts about the Flatpak utility? (Select two.)

The apps typically use a graphical interface. Repositories called remotes are used to host applications that can be installed.

The following are the correct descriptions for the listed docker commands

docker inspect gathers detailed information about a container docker ps lists all the containers in Docker docker exec connects to running containers docker log displays the logs of a container

Which of the following statements are TRUE about an overlay network? (Select two.)

it lets you overly a virtual network on another virtual network. Correct Answer: It makes a network more complex and decreases network performance.

Which of the following is an open-source application programming interface (API) that's used for creating, monitoring, migrating, starting, and stopping virtual machines?

libvirt is an open-source application programming interface (API) that's used for creating, monitoring, migrating, starting, and stopping virtual machines.

Which of the following are three popular toolsets Linux-based hypervisors used to manage virtual machines? (Select three.)

libvirt, virsh, and vmm are three popular toolsets Linux-based hypervisors use to manage virtual machines.

Which of the following BEST describes a Dockerfile?

A text file with instructions that tell Docker what to do when creating an image

There are two types of hypervisors, Type 1 and Type 2. Which of the following accurately describes those two types? (Select two.)

A type 2 hypervisor runs on an operating system. A type 1 hypervisor runs on bare metal hardware and is referred to as a native hypervisor.

Which of the following describes an OVA (open virtual appliance or application) file?

An OVA is a template that provides a single file that archives all the files that make up an OVF using TAR. Using an OVA makes it convenient to transfer a single file to another hypervisor, where the template can be used to create a new virtual machine.

There are three types of virtualization environments. Match the virtualization type on the left with the description on the right. Virtualization types may be used more than once.

The virtual machine completely simulates a physical computer system. Full virtualization Operating systems do not need modification to run within virtual machines. Full virtualization Only some of the components of a virtual machine are virtualized. Partial virtualization Handles some of the virtualization processing the hypervisor would normally perform. Hardware-Assisted Virtualization

Your company is deploying ten new virtual machines. You have planned the disk space for anticipated future growth. However, the hypervisor currently doesn't have enough disk space for all the disks that need to be allocated. You have placed an order for additional storage to be added to the hypervisor. You must have all ten servers operational before your order arrives. You determine that overbooking the storage space will work in the short term. Which of the following storage provisioning options should be selected?

Thin provisioning

What is the Linux software package you need to install to implement Linux bridging?

bridge-utils

Which of the following statements is TRUE about using multi-homed NICs?

You can connect each NIC to a separate virtual switch or multiple NICs to a single virtual switch.

Which of the following are facts about the snapd daemon? (Select two.)

You can use a command line tool to package your programs to run as a snap. It runs in the background.

What command line tool can you use to package your programs to run as a snap? (Select the correct answer from the drop-down list.)

You can use the command line tool Snapcraft to package your programs to run as a snap.

You are looking for a utility to manage snaps in your Linux sandboxed environment. From the drop-down list, select the utility or service that would BEST meet your needs.

You can use the snapd daemon to manage snaps in your Linux sandboxed environment.

Which of the following types of cloud storage is managed from a dashboard or webpage?

blob

Which of the following cloud storage types is accessed through network drives or as a cloud computing resource?

block

When using templates to deploy virtual machines, one challenge is to make sure that all VMs have the same settings, such as hostname, security identifiers, and even the same IP address. Which of the following allows a VM to be provisioned with unique settings and configurations?

bootstrapping

The /etc/cloud/cloud.cfg file controls the cloud-init modules that are run. The modules represent configuration stages. Which of the following are the three configuration stages used by cloud-init? (Select three.)

the init stage, the config stage, and the final stage