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A+ 220-1001 > 1001: Virtualization and Cloud Computing > Flashcards

1001: Virtualization and Cloud Computing Flashcards

1
Q

Describe Infrastructure as a service (IaaS).

A

Vendor provides platform or data center, client installs and manages own operating systems and applications

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2
Q

What kind of service is provided when a vendor provides Software as a Solution (SaaS)?

A

Entire solution - vendor provides operating system, infrastructure, and application. Vendor managed.

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3
Q

How is Platform as a Service (PaaS) different than IaaS?

A

In PaaS, vendor provides infrastructure and software, client is still involved in the managment.

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4
Q

What is the difference between a public and private cloud solution?

A

Public - company pays another company to manage the environment

Private - when the environment is hosted by the company itself

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5
Q

What is the biggest drawback to a private cloud solution? Biggest benefit?

A

High overhead (trained staff to deploy, manage and secure).

Granular control over the security of your data

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6
Q

What is the biggest advantage of a public cloud solution? Biggest disadvantatge?

A

Putting the service into trained and capable hands.

Your data is at the mercy of the vendor.

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7
Q

Describe a community cloud solution.

A

One cloud shared by multiple organizations for a common purpose.

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8
Q

What type of machines are used in a cloud environment?

A

VMs (Virtual Machines)

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9
Q

How are resources allocated in a cloud virtual environment?

A

Resources are dynamically shared between VMs

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10
Q

Describe rapid elasticity when referring to cloud computing.

A

The ability to dynamically assign and remove computing resources on the fly

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11
Q

What is the term used when a customer only pays for the resources used rather than paying for unused resources?

A

On-Demand

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12
Q

What is the term used when CPU and memory resources are stored in containers for shared use by virtual machines?

A

Resource Pooling

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13
Q

Describe measured service when referring to cloud computing.

A

Resource utilization is tracked and charged similar to a utilities company

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14
Q

Which type of service is best for customers who cannot predict their cloud resource usage?

A

Measured service

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15
Q

What is the difference between measured and metered service?

A

Metered service is paid ahead of time, regardless of actual usage. Measured is paid after the usage period

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16
Q

Gmail is an example of what type of cloud service?

A

SaaS (Software as a service)

17
Q

What is provided by most cloud synchronization apps that allow recovery from accidental edits or deletions?

A

Versioning services

18
Q

What is a primary benefit of cloud applications over web applications?

A

Cloud apps sometimes don’t require an internet connection to function

19
Q

What are the 3 primary models of VDIs (virtual desktop infrastructures)?

A

Centralized
Hosted
Remote Virtual Desktops

20
Q

Describe a hosted VDI.

A

Desktops are maintained by a service provider

21
Q

What makes a remote virtual desktop VDI different?

A

Desktop images are copied to the local machine, eliminating the need for a constant network connection

22
Q

What must occur for a virtual NIC to be able to communicate with the physical network connected to the underlying host device?

A

The VNIC must be configured to communicate with the physical NIC of the underlying host

23
Q

What are the hardware requirement differences between emulation software and virtualization software?

A

Virtualization software often requires that the motherboard support hardware-assisted virtualization.

Emulation software does not.

24
Q

What is the best method for securing VMs and hypervisors?

A

Maintain updates and patches

25
Q

What is a hypervisor?

A

Software that allows VMs to exist on a server

26
Q

What is the result of an attacker gaining access to the hypervisor of a virtual environment?

A

They gain root-level access to all systems

27
Q

What is the difference between a Type I and Type II hypervisor?

A

Type I - Hypervisor runs directly on host hardware

Type II - Conventional OS environment that runs the hypervisor 1 level above the OS

28
Q

Oracle VirtualBox, Citrix Xen, and VMware Workstation are all examples of what type of hypervisor?

A

Type II

29
Q

What does the acronym VDI stand for?

A

Virtual Desktop Infrastructure

30
Q

What kind of workstation is most likely to be used to connect to a virtual environment?

A

Thin Client

A+ 220-1001 (8 decks)

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