Virtualization

Question 1

A cloud provider that essentially acts as an organization’s virtual data center and allows movement of servers, routers, firewalls, and switches to the cloud would be described as -

Answer 1

IaaS - Infrastructure as a Service

A cloud model that allows organizations to move their entire infrastructure to the cloud - items such as routers, switches, firewalls, and servers.

Question 2

SaaS - Software as a service

Answer 2

describes any software that doesn’t need to be installed locally on a device and can be accessed anywhere there is an Internet connection.

Examples of SaaS providers include Google Apps® and Dropbox®.

Question 3

A program that is accessible via a web browser on any device while you have an internet connection would be described as what type of service?

Answer 3

software as a service (SaaS)

describes any software that doesn’t need to be installed locally on a device and can be accessed anywhere there is an Internet connection.

Question 4

A software developer who just wants to write code and doesn’t want to set up or manage networks herself would need what kind of cloud provider?

Answer 4

PaaS (platform as a service)

provide platforms for software developers to build, create, and maintain their applications. The PaaS provider handles everything on the back-end, including setup and maintenance of servers and networking equipment.

Question 5

paas (platform as a service)

Answer 5

provide platforms for software developers to build, create, and maintain their applications. The PaaS provider handles everything on the back-end, including setup and maintenance of servers and networking equipment.

Question 6

public cloud

Answer 6

refers to anything that is delivered across the open Internet. When someone uses the term the cloud, they are often referring to the public cloud.

Dropbox is an app that is accessible to anyone over the internet, for example.

Question 7

private cloud

Answer 7

the most expensive of the cloud implementation options, they are also the most secure. If an organization has high security concerns, and can afford a private cloud, it is the best option

Question 8

hybrid cloud

Answer 8

combines public, community, and private clouds to meet unique requirements.

Ex. A company can’t afford all of their data to be put in a private cloud, but needs the sensitive data private.

Question 9

rapid elasticity

Answer 9

term used to describe the flexibility of virtualization, which includes allowing users to add and remove resources to servers as they need them. On-demand self-service, on the other hand, deals with the ability for a user to set up any cloud resource in general without needing any human interaction (e.g. having to ask someone on the IT team to set up a server for you).

Question 10

resource pooling

Answer 10

concept of combining multiple physical server resources into one bucket or pool, which can then be used as needed for virtual servers.

Question 11

metered service

Answer 11

Companies with metered service will bill their clients based on specific measurements. These measurements could be based on a number of different factors, including web traffic (bandwidth), CPU usage, or database usage. The expansion and shrinking of resources based on demand is an example of rapid elasticity.

Question 12

When creating a virtual machine (VM), which two resources are considered the most?

Answer 12

RAM and CPU

A virtual machine will be limited to the hardware capabilities of the computer it is hosted on. The CPU and RAM capacities of the host machine will directly affect the capabilities of the virtual machines it hosts.

Question 13

synchronization

Answer 13

anytime you make a change in one place, the document is automatically updated to the newest version in all places

helps ensure the documents stay updated no matter what device is accessing the files

Question 14

client side virtualization

Answer 14

the process of using a client desktop or endpoint to host multiple other virtual machines. These other virtual machines commonly have different operating systems along with their own set of specific applications.

Desktop virtualization would refer to delivering a desktop experience in real-time over the network to an end-user.

Server virtualization would refer to using a virtualized server to service many client endpoints or requests.

Network function virtualization refers to separating a network role or service from the hardware it would typically run on.

Question 15

emulator

Answer 15

used to replicate or mimic the behavior of another device (such as a computer mimicking a Super Nintendo® device).

Question 16

virtual machine (VM)

Answer 16

configuring one machine to open up another operating system through the same machine, for ex. practicing using Linux on a VM while the computer itself is Windows 10.

useful because they allow for the use of multiple desktops without the need to purchase expensive hardware for every single machine. One use for a virtual desktop is the need for multiple operating systems.

Question 17

hypervisor

Answer 17

handles all interactions during virtualization and makes it possible to run multiple guest operating systems at one time. Hypervisors are needed for full virtualization.

VMware ESXi® and Microsoft Hyper-V® are examples of hypervisors

Question 18

internal networking

Answer 18

function that allows a VM to communicate with other VMs that you specify, but not access the Internet or any other computers on your network.

For ex. An engineer is creating a virtual machine to use as a lab computer. He wants to ensure that the virtual machine only has access to other virtual machine lab computers that he specifies and not to the production network or the Internet.

Question 19

NAT mode

Answer 19

option in a virtual machine allows the virtual machine to make outbound connections only.

Question 20

bridged mode

Answer 20

VM is able to communicate directly through the network to which the physical machine is connected.

Question 21

community cloud

Answer 21

A cloud that is used and shared by multiple organizations is called a community cloud.

Question 22

virtual application streaming

Answer 22

Having the ability to access your applications from anywhere you login has become a necessity for most enterprise environments. Virtual application streaming allows this to be possible by hosting the applications on a server, and only providing these applications in an on-demand fashion when you need to interact with them. A popular example of this in the real world is using Microsoft’s App-V Server.

Question 23

sandbox

Answer 23

temporary, isolated virtual environment that can be used for testing or quarantining. A sandbox creates a safe environment separated virtually from the host machine to eliminate the potential contamination of the host machine. Data in the sandbox is only in the sandbox and does not save to the host. When the sandbox is terminated, all data associated with the sandbox is also removed.

Question 24

When you’re thinking about running a VM (virtual machine) on your computer, what does your computer need to accomodate this?

Answer 24

• plenty of RAM available.
• hard drive space.

If your physical machine doesn’t have a lot of RAM, then you will not be able to provide enough RAM for your virtual machine to run smoothly.