Cloud Computing Service Model Comparison

The assignment requires a comparison of three cloud computing service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). The analysis includes discussions on their strengths and weaknesses, security concerns, and advantages. A recommended approach is suggested for the Regional Gardens to implement a PaaS solution, which would provide cost-effectiveness and utilize existing infrastructure. However, problems associated with PaaS, such as higher downtime and less data security, are also mentioned.

Running head: CLOUD COMPUTING
Cloud Computing
Name of the Student
Name of the University
Author Note

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Table of Contents
Answer 1................................................................................................2
Answer 2................................................................................................2
2.1. Approaches for Office Automation...............................................2
2.1.1. Integrated Approach of Office Automation............................2
2.1.2. The Cloud Approach...............................................................3
2.2. The Chosen Approach..................................................................3
Answer 3................................................................................................4
Answer 4................................................................................................6
4.1. Differences between the three approaches.................................6
4.2. The Recommended Approach......................................................7
References.............................................................................................9

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Answer 1
In attached presentation file.
Answer 2
2.1. Approaches for Office Automation
Regional Garden’s first undertaking is to provide an office automation
system for their staffs so that the staffs of the organization are able to
access the different services such as email, word processing, spreadsheet
capabilities and the online storage of files. However, the organization is very
concerned about the different critical issues associated with this change. The
two approaches of office automation services that are recommended for
Regional Gardens are integrated approach of office automation and use of
cloud in office automation. In order to understand which approach will be
appropriate for Regional gardens, it is essential to evaluate the
functionalities, advantages and disadvantages of both the approach. The two
different approaches of office automation are elaborated in the following
section.
2.1.1. Integrated Approach of Office Automation
In this approach a configured network of computer hardware and
software is used in order to store and access the data. The design and
implementation of an integrated office automation system indicates that the
organization will take in charge of automating the different processes

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running within an organization. This should be linear with all the elements
including users, equipments and different services running within the
organization. An automated system can be implemented inside the premises
of Regional Gardens where data will be stored within the organization’s
hardware. One of the major disadvantages of using an integrated system is
that, the data will have to be managed by the organization and a lot of
physical space is needed to store the organization’s data within the premise.
The existing infrastructure of the organization can support an integrated
approach.
2.1.2. The Cloud Approach
Another suggested method of implementing office automation system
in Regional Gardens is use of cloud in data storage. The storage of data in
the cloud will not only provide the much needed security but will also
enhance the data accessibility. The employees of Regional Gardens can
access the data stored over cloud with the help of web browser (Xu, 2012).
The cloud automation approach will be integrating all the processes and
functions running within an organization. One of the major advantages of
cloud approach is that it can be customized according to the requirements of
the organization. Having an uninterrupted internet connection is a necessary
need for this approach.
2.2. The Chosen Approach

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There are certain advantages of cloud approach of office automation in
comparison to the integrated approach. One of which is the storage of data
in the cloud server. Moving to the cloud will enhance the different function of
office automation. Since the accessibility of the data will be enhanced by this
approach, it is recommended for Regional Gardens to make use of Cloud
computing for office automation.

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Answer 3
The differences between IaaS and PaaS approaches in public cloud are
as follows (Obrutsky, 2016)-
IaaS platform of cloud computing
IaaS or infrastructure as a service is a
provider of virtualized computing
resources over internet.
IaaS provides an instant computing
architecture that can be managed
over internet. The infrastructure will
be provided by the cloud provider.
It generally deals with a self service
model that is used for accessing and
managing the data stored over a
remote data centre.
If infrastructure space is unavailable,
this type of cloud computing
approach is used.
It reduces the infrastructure cost,
that will provide a virtually limitless
scalability and agility
It helps in reducing the costing of IT
staffs and it is mainly subscription

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based.
The IaaS service providers include
Azure, Amazon and so on.
PaaS platform of cloud
computing
PaaS provides an on demand self
service and resource pooling
PaaS is a platform as a service
providing the platform for the users
to develop run and manage their
application.
It is a third party service provider
that delivers different hardware and
software tools that are needed for
storing and accessing a data.
It allows multiple users to access the
system.
The differences between the IaaS and PaaS approach is elaborated in the
above table. Apart from this, cost of implementation is a major difference
between these two approaches. The IaaS is more costly to implement as it
provides the whole cloud infrastructure to the client. On the other hand, the
PaaS approach provides a platform for implementing the cloud services in an
organization. IaaS is generally more secure in comparison to PaaS (Zissis &

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Lekkas, 2012). However, since Regional Gardens is planning to implement it
in a public cloud platform, security will be a major issue.
Answer 4
4.1. Differences between the three approaches
The differences between IaaS, PaaS and SaaS are as follows (Jadeja &
Modi, 2012,)-
Characteristics PaaS IaaS SaaS
Definition PaaS or platform
as a service
provides a
platform to the
client is building
a cloud
application over
internet.
IaaS or
infrastructure as
a service is very
much different
from PaaS as it
provides an
option of
virtualized
SaaS or software
as a service can
be defined as a
distribution
model where a
third party
service provides
hosts an

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However, it does
not provide the
cloud
infrastructure
computing
resources over
the internet
(Manvi & Shyam,
2014). It provides
a cloud
infrastructure as
well
application over
internet and
makes it
available for the
general public.
Characteristics Implementation
time of PaaS is
much less and
provides on
demand services
Implementation
time of IaaS is
lengthy and
costly in
comparison to
PaaS
Implementation
time is less than
both IaaS and
PaaS
Advantages of
the approach
PaaS is a cost
effective solution
and can be
deployed in a
very less time.
Furthermore, the
PaaS service is
scalable and
easily
Although the cost
of
implementation
of IaaS is
comparatively
higher than PaaS,
it provides a
much more
secure
SaaS has the
lowest upfront
cost and can be
easily deployed.
In SaaS the
complexity of the
IT infrastructure
and the
associated

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customizable connection in
comparison to
PaaS or SaaS
(Moreno-
Vozmediano,
Montero &
Llorente, I2012)
upaadates are
taken care of by
the client and so
it is easily
deployable
architecture.
Disadvantages One of the Major
disadvantages of
PaaS approach is
that it is not
much secure as it
provides a shared
platform (Chen &
Zhao, 2012).
In IaaS, the
customer is
responsible for
VM Management
and is one of the
expensive cloud
approach
SaaS although is
easily deployable,
the client has no
control over the
data of the
customer stored
over cloud
(Aghera,
Chaudhary &
Kumar, 2012).
Furthermore, the
cloud vendor
might be able to
access the
customers’ data.