Questions On Management Information Systems

The cloud can provide swift access to malleable and low budget IT resources. With the use of cloud computing, you are not required to make big direct investments in hardware and spend a lot of time on managing that hardware and associated services. Cloud Computing compromises a comprehensive set of on-demand services, such as global computing, storage, database, analytics, application, and deployment services. These services will assist an organization move quicker, reduce IT costs, and scale systems. Cloud Computing has three key categories, they are usually referred to as Infrastructure as a Service (IaaS), Platform as a Service (PaaS), Mobile as a Service (MaaS) and Software as a Service (SaaS).

Platform as a Service refers to a kind of cloud of computing where the service provider only provides a platform or infrastructure upon which the customer uses to install his or her own applications (Williams, 2012). However in order to ensure that the platform provides supports a wider range of applications, it allows for the combination of servers and operating systems. Force.com and Google App Engine are some of the most popular platforms falling under this category.

As we learned in previous weeks, cloud computing services have three major different cloud architectures for different demanding customers. The three different architectures are Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). For the words of the name, we can see the obvious differences among these three architectures, which they provide different cloud services based on their specific cloud architectures. What are the differences among these three cloud services? What are the responsibilities for the cloud services providers? What are the responsibilities for the customers? The following will discuss about these questions.

SaaS: which stands for “Software as a Service”. This is the most complete service among all

[1] Understanding the Cloud Computing Stack: SaaS, PaaS, IaaS | Knowledge Center | Rackspace Hosting. 2015. Understanding the Cloud Computing Stack: SaaS, PaaS, IaaS | Knowledge Center | Rackspace Hosting. [ONLINE] Available at:http://www.rackspace.com/knowledge_center/whitepaper/understanding-the-cloud-computing-stack-saas-paas-iaas. [Accessed 15 August

which often use these platforms to develop their services, and PaaS also allow third parties to

Cloud computing offers services to users based on on-demand self-service, broad network access, measured service, resource pooling and rapid elasticity; These characteristics promise a faster time for implementation, lower cost, superior scalability and a better end user satisfaction. These services are delivered in models known as Software As A service (SaaS), Platform As A Service (PAAS), and Infrastructure As A Service (IAAS). The first layer which is the Software As A service (SaaS) is the layer in which software applications are delivered to end users. Below is the Platform As A Service (PAAS) layer which offers a platform on which applications can be developed. The lowest layer is the Infrastructure As A Service (IAAS) layer, in this layer the physical servers and network infrastructure is offered as a service. These services can be deployed throughout the internet (Public Cloud Computing), on the intranet infrastructure, (Private Cloud Computing), in a shared community of private networks (Community Cloud Computing), or a hybrid of both (Hybrid Cloud Computing). The service deployment models are [8]:

SaaS, or Software as a Service, portrays any cloud administration where buyers have the capacity to get to software/programming applications over the web. The applications are facilitated in "the cloud" and can be utilized for an extensive variety of errands for both people and companies. Google, Twitter, Facebook and Flickr are all samples of SaaS, with clients ready to get to the administrations by means of any web empowered gadget. Endeavor clients have the capacity to utilize applications for a scope of necessities,

Cloud because of its wide range of applications it allows users to store data their data remotely in the cloud and enjoy the on-demand high quality cloud applications and reveal burden from the local storage, cost and maintenance. In this according to the user’s perspective, including both individuals (private) and enterprises like companies appealing the cloud benefits by storing data remotely into the cloud in a flexible on-demand manner and relief of the burden of storage management along with this he/she can also enjoy the universal data access which dependent geographical locations and avoidance of the capital expenditure, software, hardware and personnel management and maintenances and so on.

SaaS – Software as a Service – Users on the service are given access to the application’s software and databases, cloud providers manage the infrastructure and platforms that run the application. “On demand”.

b. Software as a service or the SaaS : Cloud platforms that allow the clients to access several software modules and databases that are installed on the platform itself, are considered to use the SaaS model (He, Fan and Li 2013).

(5) Managed Service Provider - this is a service provided application that actually resides in the vendors cloud. Example are anti-virus and anti-spam applications.

This coordinates elements supporting high adaptability and multi-occupancy. In addition, distributed computing minimizes the capital consumption. This methodology is gadget and client area free. As indicated by the not at all like sorts of administrations offered, distributed computing can be considered to comprise of three layers. IaaS or Infrastructure as a Service (IaaS) is the most minimal layer that gives fundamental base bolster administration. PaaS - the Platform as a Service (PaaS) layer is the center layer, which offers stage arranged administrations, other than giving the earth to facilitating client 's applications. SaaS - Software as a Service (SaaS) is the highest layer which includes a complete application offered as administration on interest. SaaS guarantees that the complete applications are facilitated on the web and clients use them. The installment is being made on a pay-per-use model. It takes out the need to introduce and run the application on the client 's nearby PC, in this manner mitigating the client 's weight for programming consideration. In SaaS, there is the Divided Cloud and Convergence intelligibility instrument whereby each information thing has either the "Read Lock" or "Compose Lock". Two sorts of servers are utilized by SaaS: the Main Consistence Server (MCS) and Domain Consistence Server (DCS). Reserve rationality is

Cloud computing is a relatively new business model in the computing world. According to the official NIST definition, "cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction." The NIST definition lists five essential characteristics of cloud computing: on-demand self-service, broad network access, resource pooling, rapid elasticity or expansion, and measured service. It also lists three "service models" (software, platform and infrastructure), and four "deployment models" (private, community, public and hybrid) that together categorize ways to deliver cloud services. The definition is intended to serve as a means for broad comparisons of cloud services and deployment strategies, and to provide a baseline for discussion from what is cloud computing to how to best use cloud computing.[1]

• Services can be obtained from diverse sources that cross international boundaries. Initial and ongoing costs can be reduced by the use of infrastructure services from a single vendor rather than maintaining multiple hardware facilities that often perform duplicate functions or suffer from incompatibility problems.