Cloud computing(ppt)

Editor's Notes

1. Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a utility over a network (typically the Internet). Cloud computing is the delivery of computing services over the Internet. For example, many people use social networking sites or webmail, and these are cloud services. • Photographs that people once kept on their own computers are now being stored on servers owned by third parties.
2. On demand self service: A consumer can unilaterally provision computing capabilities, such as applications, server time and network storage, as needed automatically without requiring human interaction with each service’s provider. Broad network access: Capabilities are available over the internet and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobiles phones, laptops ) Resource pooling: The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction (e.g., country, state, or datacentre). Examples of resources include storage, processing, memory, network bandwidth, and virtual machines Rapid elasticity: Capabilities can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time. Measured Service: Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported providing transparency for both the provider and consumer of the utilized service
3. Infrastructure as a Service (IaaS) refers to hardware for hire, in terms of servers, storage capacity, and network bandwidth, with the application and the maintenance of that application layer remaining the responsibility of the customer. •
4. PaaS is a category of cloud computing that provides a platform and environment to allow developers to build applications. Developers can create apps and websites through the cloud IDE (integrated development environment) and deploy them quickly  Allows users to create software applications using tools supplied by the provider. PaaS services can consist of preconfigured features that customers can subscribe to; they can choose to include the features that meet their requirements Services are constantly updated, with existing features upgraded and additional features added. PaaS providers can assist developers from the conception of their original ideas to the creation of applications, and through to testing and deployment. Platform as a Service
5. Software-as-a-Service is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet. SaaS is also often associated with a pay-as-you-go subscription licensing model. SaaS is most often implemented to provide business software functionality to enterprise customers at a low cost while allowing those customers to obtain the same benefits of commercially licensed, internally operated software without the associated complexity of installation, management, support, licensing, and high initial cost. The architecture of SaaS-based applications is specifically designed to support many concurrent users (multitenancy) at once. Software as a service applications are accessed using web browsers over the Internet therefore web browser security is vitally important. Information security officers will need to consider various methods of securing SaaS applications. Extendable Mark-up Language (XML) encryption, Secure Socket Layer (SSL) and available options which are used in enforcing data protection transmitted over the Internet.
6. A multitenant architecture: in which all users and applications share a single, common infrastructure and code base that is centrally maintained. Easy Customization: The ability for each user to easily customize applications to fit their business processes without affecting the common infrastructure . Better Access: Improved access to data from any networked device while making it easier to manage privileges, monitor data use, and ensure everyone sees the same information at the same time. Updates are automated: whenever there is an update it is available online to existing customers, often free of charge. No new software will be required as it often is with other types of applications and the updates will usually be deployed automatically by the cloud provider. Cross device compatibility: SaaS applications can be accessed via any internet enabled device, which makes it ideal for those who use a number of different devices, such as internet enabled phones and tablets, and those who don’t always use the same computer. Accessible from any location: rather than being restricted to installations on individual computers, an application can be accessed from anywhere with an internet enabled device Software as a Service