Cloud services are distinct in its makeup and are certainly different from the more tradition data center. With the cloud service there is a huge incentive to sell on demand, which is usually measured and charged by the minute or hour. Having this feature is also elastic which means a user can dictate the amount of service needed at any given time and the service is fully managed by the provider.
This would effectively mean the customer would need nothing else but a personal computer, and access to the internet to have an effective “data center.” Another reason the cloud has become so popular is because this element is able to provide significant innovations in virtualization and distributed computing, while improving access to high-speed internet.
Weathers its configured to be a private or public the cloud, its able to switch comfortably between the two while still providing the necessary services on both sides. The public cloud can sell services to anyone on the internet. While the private cloud functions are more as a proprietary network or data center that supplies hosted services to a limited group. The end goal of the cloud computing would be to provide easy, scalable access to resources and IT services.
There are 3 types of (main) services offered with Cloud computing: IaaS, PaaS, SaaS
Infrastructure as a Service (IaaS) allow a company to only pay for the capacity, and there are supplied with the essentials to create the products needed. Think of this service to a chef buying raw food, and materials, and being able to prepare a meal from those products.
Platform as a Service will provide the buyer with some type of Operation System to build upon. The Platform can be configured for customization, but unlike IaaS you can’t change to the platform. To continue with our cooking and food analogy, think of PaaS as Pre-prep food that is frozen, the cook can make changes to how its setup, but they don’t have to worry about preparing the raw materials.
Finally, there is Software as a Service, and this is where the vendor supplies the hardware infrastructure, the software product and interacts with the user through a front-end portal. Compare this to a Fast-food restaurant where you can request a few changes such as no onions or no pickles, but for the most part you get what you get.
Check out our class on Security + for more in-depth information on this topic.