Final Exam Study Guide - Cloud Computing (Chapter 6)

What are the three variations of cloud computing?

- SaaS - PaaS - IaaS

What are the disadvantages of virtualized 'desktops'?

- if there are problems with the network or the virtualization system, many stations or users can be affected. - the overall load on the network is increased

What are the advantages of virtualized 'desktops'?

- less expensive - less complex hardware at each desktop - less configuration - lower power consumption

Examples of computing resources are:

- storage - software - computing infrastructure

Why does the cloud computing model work?

Because it is financially motivating and makes it easy for businesses to quickly scale use up or down.

What is Iaas?

Infrastructure as a Service

What is cloud computing?

It is the elastic leasing of pooled computer resources over the Internet.

Organizations/Individuals can develop their own apps on top of the hosted computers using the vendor provided software tools. This is an example of:

PaaS

Vendors provide hosted computers, an OS, and possibly a DBMS. This is an example of:

PaaS

What is Paas?

Platform as a Service

Examples of SaaS include:

Salesforce.com, Google Apps, iCloud and Office 365

What is SaaS?

Software as a Service

What is virtualization?

The process whereby multiple operating systems run as clients on a single host operating system. Gives the appearance of many computers running on a single computer.

What does PaaS allow users to do?

To create their own cloud applications using supplier-specific tools and services.

What does SaaS allow users to do?

To run existing software applications by getting a subscription.

Computing resources can be leased in such a way that both the quantity of the resources and the duration of the lease can be ___________ or ___________ dynamically.

increased; decreased

In cloud computing, organizations pay for

the resources that they use