4.1 – Compare and contrast cloud computing concepts

Question 1

Which of the following types of cloud services offers e-mail through a web
browser?
 ❍ A. SaaS
 ❍ B. IaaS
 ❍ C. PaaS
 ❍ D. Community cloud

Answer 1

A. Software as a service (SaaS) is the most commonly recognized cloud service; it
allows users to use applications to access data that is stored on the Internet by a
third party. Infrastructure as a service (IaaS) is a service that offers computer networking, storage, load balancing, routing, and VM hosting. Platform as a service
(PaaS) is used for easy-to-configure operating systems and on-demand computing. A community cloud is a mix of public and private clouds, but one where multiple organizations can share the public portion.

Question 2

Your organization requires more control over its data and infrastructure. Money is
apparently not an issue. There are only two admins and about 30 users that will
have access to the data on the cloud. Which of the following types of clouds is
the best option?
❍ A. Public
❍ B. Private
❍ C. Hybrid
❍ D. Community

Answer 2

B. The best option listed is a private cloud. This gives the most control over data
and resources in an environment where there are limited users (and a healthy budget). These resources could be entirely internal, or a portion of them could also be
provided by a third party. Public cloud technology is used for the general public to
access applications over the Internet. Hybrid is a mixture of the two, but not necessary in this situation because of the healthy budget and the limited number of
users. Community cloud is similar to hybrid but is meant for multiple organizations
that share data, which is not necessary in this scenario.

Question 3

You require the ability to add on to your cloud-based network whenever necessary, quickly and efficiently. What is this referring to?
 ❍ A. Measured services
 ❍ B. Metered services
 ❍ C. Rapid elasticity
 ❍ D. On-demand service

Answer 3

C. Rapid elasticity is the ability to build your cloud-based network, or extend
upon an existing one, quickly and efficiently. Measured services is when a provider monitors a customer’s services used so that the customer can be properly
billed. Metered services is when the customer can access as many resources as
needed but only be billed for what was accessed. On-demand service means that
the cloud service is available at all times. The leaders of a successful organization
don’t care what it takes; they simply want high-speed, secure access to
services 24/7.