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INTRODUCTION, , Cloud Computing provides us a means by which, we can access the applications as utilities, over, the Internet. It allows us to create, configure, and, customize applications online., , With Cloud Computing users can access database, resources via the internet from anywhere for as, long as they need without worrying about any, maintenance or management of actual resources., , What is Cloud?, , The term Cloud refers to a Network or Internet., In other words, we can say that Cloud is something,, which is present at remote location., , Cloud can provide services over network, i.¢.,, , on public networks or on private networks, i:, WAN, LAN or VPN., , Applications such as e-mail, web conferencing,, customer relationship management (CRM),, , all run in cloud.

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What is Cloud Computing?, , Cloud Computing refers to manipulating,, configuring, and accessing the applications online., It offers online data storage, infrastructure and application., , Cloud Computing is both a combination of software and, hardware based computing resources delivered as a, network service., , Cloud Computing Architecture, , @ @ BG

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Basic Concepts, , There are certain services and models working behind the, scene making the cloud computing feasible and accessible, to end users. Following are the working models for cloud, computing:, , 1. Deployment Models, , 2. Service Models, , Deployment Models, , Deployment models define the type of access to the, cloud, i.c., how the cloud is located? Cloud can have any, of the four types of access: Public, Private, Hybrid and, Community.

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PUBLIC CLOUD: The Public Cloud allows systems and services to be, easily accessible to the general public. Public cloud may be less secure becaus, of its openness, ¢.g., e-mail., , PRIVATE CLOUD : The Private Cloud allows systems and services to, accessible within an organization. It offers increased security because of its, private nature., , COMMUNITY CLOUD: The Community Cloud allows systems and, , services to be accessible by group of organizations., , HYBRID CLOUD : The Hybrid Cloud is mixture of public and private, cloud. However, the critical activities are performed using private cloud while, the non-cnitical activities are performed using public cloud.