Introduction: networks (like internet) or any large networked environment.

Introduction:Dueto the technological advancement in the field of Information Technology (IT), onlinetechnologies have changed the way of learning. Cloud is a term used as ametaphor for the wide area networks (like internet) or any large networked environment.

Cloud computing is a way in which services are being provided to the usersthrough the internet where they can store their data and information. Cloudconsists of large number of computers that are interconnected through a hugenetwork either located in same or different geographical locations, operatingtogether to serve a number of customers with different needs with help of virtualization.Cloud services are provided to the users as utility services like water,electricity and telephone using pay-as-you-use business model. Cloud users usethese services provided by the cloud providers from there build applications inthe internet and thus deliver them to their end users. In this way the cloudusers don’t have to worry about installing or maintaining physical hardware andsoftware needed for its use, and also allow users to reduce their expenditurein the field of IT using or maintaining their own cloud services they can usealready made cloud services that are provided.

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Though it is not a new idea thatemerged just recently. In 1969 1 L. Klein rock anticipated, “As of now,computer networks are still in their infancy. But as they grow up and becomemore sophisticated, we will probably see the spread of ‘computer utilities’which, like present electric and telephone utilities, will service individualhomes and offices across the country.” Inbrief, the main aim of cloud computing is to provide storage or hostingservices such as online data storage and backup solutions that are inexpensiveover a large network. In recent year’s organizations and other fields such aseducation, health and telecommunications etc. are concentrating more on usingcloud services due to its accessibility of virtualized resources.

Therefore,the aim of this research is to present, not only the use or services offered bythe cloud in any field but also how cloud computing is perceived by them. It alsodiscusses why there is a need for cloud computing in near future.… … …… … … Cloud Computing And Its Advantages/Disadvantages:The common term for the delivery of hosted servicesover internet is called cloud computing. It enables the companies to fullyutilize a resource, such as storage or an application, as an advantage ratherthan having to build and maintain computing equipment in a house.… … It has obtained mass appeal in business as itenables their data center to operate like the internet throughout the processof enabling computing resources to be accessed and shared. Small businesses canaccess these resources and expand or shrink them as business needs change.

Third party clouds enable companies to focus on their core businesses insteadof spending on computer infrastructure and maintenance. The main aim of cloudcomputing is to allow users to benefit from all the technologies without theneed of extensive knowledge or expertise.… …   … … .

. ..There are three types of cloud computing2: ·     Public·     Private·     HybridThe main difference between public and private isthat public cloud is not responsible for any of the management, whereas privatecloud hosting is inside the company’s intranet and all the company’s data is protected bya firewall. A hybridcloud is a combination of public cloud services and an on-premises privatecloud, with orchestration and automation between the two.… … … … … ..

..   The advantages of cloud computing are asfollows:·     Minimum cost·     Unlimited storage·     Backup & recovery·     Easy access to informationIn spite of its many benefits, cloud computing alsohas its disadvantages3,4 and they are as follows:·     Technical issues·     Security in cloud·     Prone to attack   Types of Services:1: SAAS (SOFTWARE AS SERVICE)SaaSis one of the 3 main class of cloud computing. In this software distributionmodel the third party provide host application and make them available to thecustomer across the internet.

On the customer side, it means no upfrontinvestment in server or software license. In SaaS there is no need for theorganization to install and run applications on their own computers or in theirdata research centers. This lead to the elimination of expensive hardwareassets, maintenance as well as installation and support. Otheradvantage of SaaS model include:A: flexible payment: Ratherthan purchasing the software customer can easily subscribe to SAAS offering.Generally they pay for this service on the monthly basis, Customer can alsodiscontinue SAAS at any time to stop the recurring cost.

B: Automatic updates:Usercan also depend on SaaS model to automatically performed update and patch management.This will help to reduce the burden on in-house IT staff. 2. PAAS (PLATFORM AS A SERVICE)Itis another model of cloud computing in which the third party provider supplythe hardware and software tools, mostly needed for the application developmentfor the customer across the internet. One can build his/her own applicationthat run on the provider’s infrastructure that support transactions, uniform authenticationand availability. The application built using PAAS are offered as SAAS andconsumed directly from the end-user’s web browsers. This gives the ability tointegrate or consume third-party web service from the other service platforms 3. IAAS (INFRASTRUCTURE AS A SERVICE)Infrastructure as a service (IAAS) is aform of cloud computing that provides virtualized computingresources online.

It’s an instant computing infrastructure which is managedover the internet.  IAAS is one of the three main categories of cloudcomputing services, other than softwareas a service (SaaS) and platform as a service (PAAS). It gives theusers of the cloud more ?exibility to lower level than other services. Itprovides even CPU clocks with OS level control to the developers. E.

g. – AmazonEC2 and S3.In an IAAS model, a cloudprovider hosts the infrastructure components traditionally present in anon-premises data center including servers, storage and networking hardware, aswell as the virtualization.The IAAS provider also supplies a range ofservices along with those infrastructure components. These can include detailedbilling, monitoring, log access, security, balancing the load, as well as storageresiliency, such as backup, replication and recovery.IAAS helps you avoid the expense of buyingand managing your own physical servers and other data centre infrastructures. Eachresource is supplied as a separate service component and one only has to rent aparticular one for as long as he/she needs it. Howcloud computing might evolve:Cloud computing offers a new focus for ITorganizations to provide its end users with business services.

Cloud computingis a technology that provides both changeable IT distribution and dynamicbusiness agility. The cloud model increases the storage space for thebusinesses on a pay-as-you-go basis. That is, it supplies a method of freeingand joining computing capacity that had been separated inside business units.It makes the cloud model available to programs that span the entireorganization. When at its full potential, it can speed up business innovationand remodeling 7.Around 58 percent of companies spend more than 10 percent of their annualbudgets on cloud services.6ApplicationsAvailability:Most of the new softwares that are being built bythe companies are made on the cloud network, as it will be easier for more andmore users to interact with the software.

It was predicted that by 2016 morethan quarter of all the applications in the world will be available on thecloud (Global Technology Outlook: Cloud 2014: A More Disruptive Phase) 8.Increasedgrowth in market:According to Gartner, “the cloud adoption is to hit$250 billion by 2017. More companies worldwide are relying on cloud to develop,market and sell their products on the cloud for the users, as it will beaccessible from anywhere in the world ” 5. Companies that use cloud keeps itsimportant files on the cloud servers rather than providing individual copies toits users. e.g.

: Netflix Different Types Of Cloud Services Used By Various Companies Around The World:      Cloud Service Provider Free-Storage     Offered to Users Paid or Extra services provided Apple Cloud          Apple         5GB Anti-lost and wireless backup Google Drive         Google        15GB Google docs, Sheets and Slides, Office suite Dropbox     Dropbox, Inc.         2GB Computer and mobile apps for various platforms OneDrive       Microsoft         5GB Additional storage  5. Conclusion:Cloudcomputing is a powerful new technology that is scalable, reliable andavailable. It is also gaining popularity nowadays not because of its more useor services it provides but how they are provided and used.

Asa conclusion, our research shows that the use of cloud computing has a positiveimpact on the users. Many users find very comfortable and are in the favor ofusing this technology because of its easy to use convenient, saves time,increases collaboration and accessibility of data from the cloud anywhere atany time. However, if the use of cloud computing becomes more frequent in nearfuture it will lower the costs of its services and also helps in keeping theenvironment clean.