Cloud Service definition & meaning
Cloud services cover all delivery and service models of cloud computing. They run on a remote cloud computing server rather than an on-site server. All solutions and computing services can be accessed via the internet.
There are three basic delivery models of cloud services: Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS), and Infrastructure-as-a-Service (IaaS). They differ in terms of the levels of consumers’ control over cloud resources and security. The delivery model chosen directly reflects on how an organization deals with emerging security issues. In SaaS, as it uses web delivery applications, there is no need to install and run applications on individual computers. Furthermore, the level of integrated security is relatively high, consumers cannot control and manage the underlying cloud infrastructure including network, servers, storage, and operating systems.
Organizations can deliver everything from simple cloud-based apps to sophisticated, cloud-enabled enterprise applications through PaaS. With PaaS, the consumer can control the deployed applications, but he still cannot control and manage the underlying cloud infrastructure. IaaS provides the consumer with the greatest control over cloud resources and security. Consumers can make use of processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software. IaaS includes test and development, website hosting, storage, backup, and recovery, web apps, high-performance computing, big data analysis.