How is public cloud structured?
The public cloud allows users to share resources while maintaining the privacy of each user's data. Public cloud architecture is completely virtualized, providing an environment where shared resources are leveraged as needed.
A key advantage of public cloud architecture is the ability to access a service or application on any internet connected device. Because the device itself performs little to no computation, individuals can use highly complex applications almost anywhere.
Public cloud is typically designed with built-in redundancies to prevent data loss. A service provider may store replicated files across several data centers to ensure that disaster recovery is smooth and fast. Data stored on a public cloud platform is generally regarded as safe from most hazards.
Public clouds may be structured differently depending on the type of service being provided. Here are the three most common models on the market today:
Software as a service is a cloud model in which a provider distributes software hosted in the cloud. Users access the application via the internet. This model eliminates the need for individual users to install software on their personal machines. This reduces the hardware needs of the organization and cuts down on support and maintenance costs.
Platform as a service is a computing model that allows an organization to develop software without needing to maintain the underlying infrastructure. Essentially, a provider builds and supports an optimized environment which it delivers to users through a broadband connection. PaaS often includes version control and compile services as well as computing and storage resources.
Infrastructure as a service is a model in which an organization outsources their entire data center to a cloud service provider. The provider hosts everything from storage servers to networking hardware and maintains virtualization of the environment. IaaS makes cloud adoption simpler. The system is often more cost-efficient than purchasing and maintaining hardware on-site.
Benefits and challenges of public cloud
Public cloud solutions allow organizations to scale at a near infinite rate, something that would not be possible in an on-premises data center. As a business grows, it doesn't need to acquire additional hardware or maintain a sprawling network. Likewise, cloud-based services and applications require far less hardware than applications delivered in a traditional manner. In other words, users no longer have to worry about installing and updating applications on their machines. Instead, their cloud-hosted applications will always remain up to date with the latest features and security.
Financially, a public cloud strategy offers organizations a way to grow at scale without accumulating substantial costs. Providers such as Amazon Web Services, Google Cloud Platform and Microsoft Azure offer per-per-usage deals which allow organizations to pay only for the resources they use. As an operational cost, public cloud services can protect an organization's budget from high up-front capital investments.
Though public cloud hosts take security very seriously, organizations may choose to protect their data by hosting it on a privately controlled cloud. Organizations operating in heavily regulated industries, such as health care, may get the most benefit from a hybrid model. Established businesses with highly specific computational needs may also prefer a private or hybrid model for enhanced optimization of resources.
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