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Virtualization and the Cloud Computing World

Overview
The popularity and rapid adoption of Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS) by a number of organizations have impacted internal IT/IS departments. These services provide a virtualization infrastructure that covers data storage, networking, desktop computing, mobile computing, and so on.

Instructions
Write a 2–3 page paper in which you:

Describe at least three items that an organization’s IT/IS department should consider when an organization’s strategy calls for the use of SaaS, PaaS, or IaaS.
Evaluate the ways that SaaS, PaaS, and IaaS are used to reduce Total Cost of Ownership (TCO) and increase Return on Investment (ROI).
Examine the impact on the IT support personnel when an organization embarks on the strategy described in the first bulleted point.
Analyze three considerations that the organization’s management should be aware of.
Examine three security issues that could arise from this type of infrastructure.

Sample Solution

ause the builders understood Gothic technique more firmly, but also because Bourges has a total of four aisles, with the aisles furthest from the nave serving as an additional support section. This double aisle technique has allowed Bourges to create two sets of triforiums and clerestories. The lower triforium/clerestory set are located in the far aisle. Interestingly, the triforium and clerestory in these lower sections are not as architecturally detailed as the upper ones. For example note in the picture below how the clerestory on the top section employs three lancet windows and an oculus, while the clerestory below has two rounded lancets and a squat oculus. The triforium on the upper section also has far more columns than the lower one. Inside these inner aisles, one can find chapels that sit between the buttresses. Bourges supports its cavernous roof with a six-part ceiling, a slightly more primitive version than Chartres' quadripartite arrangement. Bourges also employs a series of candelabras, which hang along the nave. Intriguingly, Bourges has no transept. This means the cathedral is much more cavernous than Chartres simply because when one walks into the nave, the church literally extends all the way to the altar and to the ambulatory beyond and is not interrupted by the horizontal transept. Perhaps most unique to Bourges is its use of white stained glass windows. These white windows are the reason it is much brighter inside than in Chartres. The cathedral was cleverly designed wherein the white windows were placed higher, while the colored windows were closer to the nave-level. Thus as light floods in from the top of the cathedral, it is still possible to enjoy the stained glass at a level where it is easier to read the stories. Different from Chartres, Bourges only has one rose window, which is unfortunately obscured by the organ at the west end of the church. Notre Dame is considered the last of the "Pre-Chartres" era cathedrals. Indeed, its interior, while not as dark as Chartres, does not have the same bright quality that Bourges had. Notre Dame is a "very heavy" church, as it has wide, fat columns which support a massive triforium. Indeed, the triforium is so large that one can actually walk around in it. This leaves for a small clerestory with squat windows. Indeed, Notre Dame appears to use its windows both at the clerestory and the chapel/nave level for support. The chapel windows are squat and vary in size, different from Chartres' uniform lancets. Notre Dame's two sets of aisles also allow for support of its six-part ceiling. Notre Dame's choir section is curious. Unlike Chartres and Bourges, which for the most part have uniform decorations, Notre Dame's choir has been described as "a mess," because it has been redecorated multiple times. A baroque Pieta sits behind the altar, and behind that one can see a gold cross. The cross was placed there in 1993 to remind visitors of the Church's Christian message. One's eyes cannot help but be drawn to the gold cross as soon as they enter the church. But the masterpieces of Notre Dame's interior are its rose windows. Far more adventurous than Chartres, the builders essentially turned the north and south ends of the transept into walls of glass. The windows are not merely a series of oculi separated by wall - they contain rows of stained glass which are placed together to truly look like a rose, the symbol which Dante said represented God himself. After comparing the three great Gothic cathedrals at Chartres, Bourges and Notre Dame, it's worth noting how Gothic architecture continued to evolve. Notre Dame's use of rose windows as support were taken to heart at Sainte Chapelle of Paris, where the primary chapel which contained holy relics like the Crown of Thorns, was situated in a building with floor to ceiling windows. This breathtaking sight is truly the height of stained glass window us
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