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Cloud Computing: What, How and Why What’s in the Cloud? The ever-changing ecosystem of the Internet has thrown up a plethora of new technologies and terms many of which take the world by storm turning us common mortals into converts of the technology and sending many of us into a state of confusion. Cloud Computing is one such technology that has come up with the increased pervasiveness of the Internet in our personal and professional lives. Now the biggest question is, what is Cloud Computing? Ask that question and a layperson will be bombarded by a plethora of jargons which s/he has absolutely no clue about. Instead of answering the question, it pushes them into deeper confusion. This article will attempt to explain to a layperson exactly what this technology is, how it works, what are its benefits and what are the challenges and issues that need to be resolved before we are able to embrace this technology the way that we have embraced mobilephones. Lets start from scratch. What is Cloud Computing? It is a general term used to denote a set of technologies and networks that enable ‘Internet-based computing’ where shared resources, software and information are provided to computers and other devices on demand through the Internet. An even simpler way of explaining this would be, the use of the Internet to perform tasks that you would do on your computer. Cloud Computing has been called, a Service, a Platform and also an Operating System. The next few paragraphs will attempt to explain these offerings in simple terms. 12
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Cloud Computing has been called, a Service, a Platform and also an Operating System. In this article, the author has attempted to explain this new technology, its possible usage and its pros and cons in simple terms.
Cloud Computing as a Service: A very basic service that a computer provides us, is storage of photos, videos, music and movies. Saving files is also a basic services offered by Cloud Computing. A good example of this service is Flickr (www.flickr.com). Starting as a website that emphasised on sharing
photos it has now become a great place to store images that can be retrieved from any device anywhere around the world. Images and videos can be uploaded on to the website from absolutely anywhere in the world and can be seen from any device that is connected to the Internet. Users can share photos of their vacations/
parties etc without having to burn CDs or carrying flash drives. Instead, they can just email their friends the link to your Flickr album. Apart from storage and sharing, Flickr also offers data security. If you store all this data in your computer, chances are that they will be lost if your hard disk crashes unless you have gone through the cumbersome process of burning your photos and videos on CDs or saved them in flash drives. While keeping a local copy (in your hard drive, CD or flash drive) has its merits, but its also true that you are far more likely to lose all your data than Flickr losing your photos. Cloud Computing can enable much more than just act as a storage medium for files used for sharing. It can also be used for manipulating the information/files stored within it. Similar to the idea of Flickr, servers can be hired for the purpose of storing, accessing and updating/modifying large databases/ data-sets. Lets say in an organisation with different field offices, the same set of data will be available to all the offices to access and modify without each office having to modify their local copy of the database because every update