Ch 9 Cloud and Virtualization Quiz

How does cloud computing improve the performance and user experience of an online version of office productivity tools?

• by providing application code as needed

• by connecting local hardware devices, such as a printer, to the service provider

• by ensuring a secure connection between the client and the service provider

• by downloading the application package to the local storage

Answer explanation

Organizations use cloud-based applications to provide on-demand software delivery. When a user requests an application, minimal application code is forwarded to the client. The client pulls additional code from the cloud server as needed.

A small advertising company is considering outsourcing the information technology services to a cloud provider. The services would include user training, software licensing, and provisioning. What cloud service would the company consider purchasing?

• infrastructure as a service (IaaS)

• platform as a service (PaaS)

• IT as a service (ITaaS)

• software as a service (SaaS)

Answer explanation

IT as a service (ITaaS) extends the capability of IT services so that the company does not need to invest in new infrastructure. ITaaS providers also provide training for new personnel and licensing for new software required by the company. These services are available on demand and delivered economically to any device anywhere in the world without compromising security or function.

Which term is associated with Cloud computing?

• wireless

• virtualization

• tall servers

• teleworkers

Answer explanation

Cloud computing involves computers, software, servers, network devices, and other services physically held at a remote location. Virtualization is used by the cloud computing vendors so they can provide multiple servers, networks, applications, operating systems, etc. to clients without having to buy the equipment for each one. Virtualization of servers, for example, allows multiple servers to be on one physical server. Each server could be for a different client if necessary.

A company uses a cloud-based payroll system. Which cloud computing technology is this company using?

• infrastructure as a service (IaaS)

• software as a service (SaaS)

• wireless as a service (WaaS)

• browser as a service (BaaS)

Answer explanation

There is no such thing as BaaS. Infrastructure as a service (IaaS) is when key network devices such as routers and firewalls are leased from a provider. Wireless as a service (WaaS) is when a provider provides wireless connectivity at a fixed monthly cost.

Which statement describes the concept of cloud computing?

• separation of application from hardware

• separation of operating system from hardware

• separation of control plane from data plane

• separation of management plane from control plane

Answer explanation

Cloud computing is used to separate the application or service from hardware. Virtualization separates the operating system from the hardware.

What is the difference between a data center and cloud computing?

• Data centers require cloud computing but cloud computing does not require data centers.

• Of the two, only cloud computing is located off-site.

• Cloud computing provides access to shared computing resources, while a data center is a facility that stores and processes data.

• The data center makes use of more devices to process data.

Answer explanation

Cloud service providers use one or more data centers for services and resources such as data storage. A data center is a data storage facility located inside the company and maintained by the IT staff or leased from a co-location provider where the maintenance can be done by the provider or the corporate IT staff.

To which category of hypervisor does the Microsoft Virtual PC belong?

• Type 3

• Type 2

• Type 4

• Type 1

Answer explanation

The Microsoft Virtual PC is an example of a Type 2 hypervisor. Type 2 is hosted by an operating system.

Which cloud computing opportunity would provide the use of network hardware such as routers and switches for a particular company?

• wireless as a service (WaaS)

• infrastructure as a service (IaaS)

• software as a service (SaaS)

• browser as a service (BaaS)

Answer explanation

Routers, switches, and firewalls are infrastructure devices that can be provided in the cloud.

For a large enterprise deploying virtualized servers, what are two benefits of using a bare metal hypervisor solution instead of a hosted hypervisor solution? (Choose two.)

• enhanced security

• addition of an extra layer of abstraction

• elimination of the need for management console software

• direct access to hardware resources

• increased efficiency

Answer explanation

Type 1, or bare metal hypervisors, install directly on host hardware. Because of this, a Type 1 hypervisor has direct access to the host hardware resources; and thus has fewer layers of abstraction and is more efficient. However, bare metal hypervisors do need to have management console software to manage the VM instances.

What is a characteristic of a virtual machine on a PC?

• A virtual machine is not susceptible to threats and malicious attacks.

• A virtual machine needs a physical network adapter to connect to the Internet.

• A virtual machine runs its own operating system.

• The number of virtual machines that can be made available depends on the software resources of the host machine.

Answer explanation

Each virtual machine runs its own operating system. The number of virtual machines that can be made available depends on the hardware resources of the host machine. Virtual machines are susceptible to threats and malicious attacks, like physical computers. To connect to the Internet, a virtual machine uses a virtual network adapter, that acts like a physical adapter in a physical computer, connecting through the physical adapter on the host to establish a connection to the Internet.